Method for installing a wind turbine blade to a nacelle of an offshore wind turbine, comprising the steps of: providing a vessel or barge with wind turbine blades and a blade installer unit comprising a blade receiving cart; at the offshore wind turbine, bringing a boom of the blade installer unit towards a wind turbine tower of the wind turbine; actuating a tower gripping device unit until the tower gripping device unit engages the tower; inserting a blade into the blade receiving cart, wherein the blade is in approximately horizontal position in the cart; moving the blade receiving cart up towards the upper end of the boom of the blade installer unit; rotating the blade until the blade is in approximately vertical position; moving the blade with respect to the cart until the blade engages the nacelle for coupling to the nacelle.
Method for installation of a wind turbine blade to a nacelle installed on an offshore wind turbine tower, comprising: gripping a wind turbine blade by a blade gripping device while said blade gripping device is disengaged from a cart and a boom of a blade installer unit; engaging the blade gripping device with a coupling unit of the cart while the blade continues to be gripped by the blade gripping device, wherein the blade is oriented predominantly horizontally; moving the cart with the blade gripping device and the blade along the boom towards the upper end of the boom; rotating the coupling unit with respect to a cart base of the cart to orient the blade predominantly vertically; using the blade installer unit, aligning the blade with the nacelle for mounting of the blade to the nacelle; and mounting the aligned blade to the nacelle.
In some examples, an apparatus for coupling and decoupling a connector head to and from an end of a wired drill pipe held by an elevator includes an actuator configured to move the connector head between a coupled position and a decoupled position. The actuator is configured to move the connector head in parallel with the longitudinal axis of the wired drill pipe before moving it away from said wired drill pipe when decoupling the connector head from the wired drill pipe, and to move the connector head into the longitudinal axis of the wired drill pipe before moving it in parallel with said longitudinal axis when coupling the connector head to the wired drill pipe.
There is described the processing seawater in a subsea facility on the seabed in various methods and apparatus. In various examples, the facility is coupled to at least one well, is configured to provide the well with water to be injected into at least one formation of the well, and comprises filter elements arranged in housings, the filter elements being configured for ultrafiltration or microfiltration. In such examples, treated seawater in at least one of the housings is filtered using at least one filter element, producing thereby filtered water, and at least one filter element in at least one other of the filter housings is cleaned by backwashing performed using at least some of the produced filtered water.
A hoisting system for hoisting a load includes: i) a main winch system having a main rope with an end connector mounted to an end of the main rope, ii) an auxiliary winch system having an auxiliary rope having at least one rope connector of which at least one is a splitable rope connector, the auxiliary rope comprising a first section and a second section connected to the first section via the splitable rope connector, wherein the splitable rope connector comprises at least two connector parts that are releasably connected with each other for allowing quick disconnection and reconnection between the second section and the first section, wherein the connector parts (are configured for releasably connecting with the end connector of the main rope, and iii) a hang-off point placed and configured for at least temporarily holding a respective rope connector of the auxiliary rope for transferring the load to the hang-off point. The system may include two auxiliary winch systems.
B66C 23/18 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes
F16M 13/02 - Other supports for positioning apparatus or articlesMeans for steadying hand-held apparatus or articles for supporting on, or attaching to, an object, e.g. tree, gate, window-frame, cycle
B66D 1/26 - Rope, cable, or chain winding mechanismsCapstans having several drums or barrels
F16G 11/00 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes
Method for installing a wind turbine blade to a nacelle of an offshore wind turbine, comprising the steps of: providing a vessel or barge with wind turbine blades and a blade installer unit comprising a blade receiving cart; at the offshore wind turbine, bringing a boom of the blade installer unit towards a wind turbine tower of the wind turbine; actuating a tower gripping device unit until the tower gripping device unit engages the tower; inserting a blade into the blade receiving cart, wherein the blade is in approximately horizontal position in the cart; moving the blade receiving cart up towards the upper end of the boom of the blade installer unit; rotating the blade until the blade is in approximately vertical position; moving the blade with respect to the cart until the blade engages the nacelle for coupling to the nacelle.
F03D 13/10 - Assembly of wind motorsArrangements for erecting wind motors
B66C 1/10 - Load-engaging elements or devices attached to lifting, lowering, or hauling gear of cranes, or adapted for connection therewith for transmitting forces to articles or groups of articles by mechanical means
B66C 23/20 - Cranes comprising essentially a beam, boom or triangular structure acting as a cantilever and mounted for translatory or swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib cranes, derricks or tower cranes specially adapted for use in particular locations or for particular purposes with supporting couples provided by walls of buildings or like structures
A motion-stabilized crane system includes a crane base extending from a first end to a second end opposite the first end, a crane boom having a first end pivotably coupled to the second end of the crane base and a second end opposite the first end, a hoisting cable, a hook, a motion stabilizer including a hook housing in which at least one of the hoisting cable and the hook is received, a linear actuator configured to rotate the hook housing about a first, a sensor configured to capture as a sensor output associated with the position of at least one of the hook and the hoisting cable in the hook housing, and a stabilizer control module configured to activate the linear actuator to reduce an angle formed between at least one of the hook and the hoisting cable and a vertical axis based on the senor output.
B66C 13/06 - Auxiliary devices for controlling movements of suspended loads, or for preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
B66C 13/16 - Applications of indicating, registering, or weighing devices
Liner hanger running tool (LHRT) having a mandrel with a central through-bore includes a transducer configured to identify a predetermined activation signal and, based on receipt of the predetermined activation signal, transmit an actuation signal. The LHRT also includes a power source. In addition, the LHRT includes a valve. Further, the LHRT includes an actuator configured to be operated by the power source and activated by the actuation signal from the transducer to close the valve in the central through-bore in the mandrel.
E21B 23/08 - Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
9.
APPARATUS, SYSTEM AND METHODS FOR MOVING A LOAD BETWEEN A FLOATING VESSEL AND A SUBMERGED POSITION
The present disclosure describes an apparatus (1) for suspending a connector (101) provided on a first elongated hoisting member (100) during a subsea hoisting operation. The apparatus comprises a mechanism (300) for holding the connector, in which, when the mechanism is subjected to a hydrostatic pressure above a threshold pressure, the mechanism is changeable to a configuration for moving past the connector while the apparatus is raised. Also described are a system and methods for moving a load between a floating vessel and a submerged position.
B66C 13/02 - Devices for facilitating retrieval of floating objects, e.g. for recovering craft from water
E02B 17/08 - Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
E21B 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables
A drill string for drilling a borehole in various embodiments is located in the borehole whereby an annulus is provided between the drill string and a wall of the borehole for conveying a drilling fluid entrained with cuttings along the drill string, the drill string having an axis of rotation, the drill string comprising at least one exciter for generating lateral motions of the drill string by rotation of the string and the exciter together in the borehole for discouraging cuttings from settling in the annulus for reducing or hindering development of a cuttings bed. Various examples are described also of the exciter, a drill string sub, drill pipe and a method of drilling.
The invention relates to a method of stimulating a well, the method comprising the steps of: - providing a wellbore according to claim 6; - opening one of the one or more valves in the tubing to open a flow path to a formation; and - providing a pressurised fluid in the wellbore to fracture the formation to stimulate the well. The invention further has a plural-ity of aspects that may be related to the method of stimulating the well, including e.g. a valve for use in a wellbore for facilitating for a multi-stage stimulation method, wherein the valve comprises: - a first sleeve being movable for opening the valve; and - a second sleeve being movable for closing the valve, wherein the first and the second sleeve are both movable in a first direction, wherein movement of the first sleeve a first distance in the first direction opens the valve and subsequent movement of the second sleeve a second distance in the first direction closes the valve, and a method of operating a valve to open and close the valve, wherein the method comprises the steps of: - using a tool to operate the valve; - moving the tool a distance in a first direction to open the valve; and - moving the tool a second distance further in the first direction to close the valve.
E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
A flow control device (100) for controlling flow in a fluid processing system, a related system, apparatus, and a method. In various example, the flow control device comprises: a housing (110) which comprises a plurality of process ports (115a-115d); and at least one selector (120) which is movably disposed inside the housing and is operable by at least one actuator (130) to switch between configurations of the flow control device in use. In at least one of the configurations, the selector may be positioned so that at least one of the plurality of process ports is selected for communicating fluid on one course through the housing through the selected process port and simultaneously communicating fluid on another course through the housing through at least one other of the process ports.
F16K 11/085 - Multiple-way valves, e.g. mixing valvesPipe fittings incorporating such valvesArrangement of valves and flow lines specially adapted for mixing fluid with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
E21B 34/00 - Valve arrangements for boreholes or wells
B01D 29/66 - Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
B01D 43/00 - Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration
There is described the processing seawater in a subsea facility on the seabed in various methods and apparatus. In various examples, the facility is coupled to at least one well, is configured to provide the well with water to be injected into at least one formation of the well, and comprises filter elements arranged in housings, the filter elements being config-ured for ultrafiltration or microfiltration. In such examples, treated seawater in at least one of the housings is filtered using at least one filter element, producing thereby filtered water, and at least one filter element in at least one other of the filter housings is cleaned by back-washing performed using at least some of the produced filtered water.
E21B 43/01 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
E21B 41/00 - Equipment or details not covered by groups
B01D 61/00 - Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltrationApparatus, accessories or auxiliary operations specially adapted therefor
B01D 65/00 - Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
A system comprising a drilling rig having a rig floor, a derrick, a master control computer system and at least one camera, the at least one camera capturing a master image of at least a portion of the rig floor, sending the master image to the master control computer, the master control computer system mapping said master image into a model to facilitate control of items on said drilling rig.
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
E21B 41/00 - Equipment or details not covered by groups
E21B 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables
F16P 3/14 - Safety devices acting in conjunction with the control or operation of a machineControl arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
G06V 20/52 - Surveillance or monitoring of activities, e.g. for recognising suspicious objects
G06F 18/2413 - Classification techniques relating to the classification model, e.g. parametric or non-parametric approaches based on distances to training or reference patterns
H04N 13/271 - Image signal generators wherein the generated image signals comprise depth maps or disparity maps
H04N 13/243 - Image signal generators using stereoscopic image cameras using three or more 2D image sensors
15.
Hoisting system and method for hoisting a vertically-suspended object
A hoisting system is for hoisting a vertically-suspended object. The hoisting system has a winch having a winch drum with a hoisting rope. A first part of the hoisting rope has a first diameter and a second part has a second diameter being larger than the first diameter. The first part is connected with a first end of the second part. The first part is an inner part on the winch drum when the winch drum is completely wound. The second part has a further end that is connectable to the object for hoisting the object. A ratio between the first diameter and the second diameter is such that the minimum breakable load of the first part differs less than a factor of four from the minimum breakable load of the second part, and preferably less than a factor of three. A corresponding method is disclosed.
The invention relates to an apparatus and a method for coupling and decoupling a con-nector head to and from an end of a wired drill pipe held by an elevator, wherein the appa-ratus comprises an actuator configured to move the connector head between a coupled position, where the connector head is coupled to the end of the wired drill pipe, and a de-coupled position, where the connector head is displaced from the axis of said wired drill pipe, wherein the actuator is configured to move the connector head in parallel with the axis of the wired drill pipe before moving it away from said wired drill pipe when decou-pling the connector head from the wired drill pipe, and to move the connector head into the axis of the wired drill pipe before moving it in parallel with said axis when coupling the connector head to the wired drill pipe.
In a first aspect, the invention relates to an electrolytic cell comprising an anode and a cathode, wherein the cathode comprises a surface layer which is repellent towards inor-ganic material. In a second aspect, the invention relates to an apparatus for cleaning seawater, wherein the apparatus comprises the electrolytic cell according to the first as-pect of the invention. In a third aspect, the invention relates to a system for injecting cleaned seawater into a hydrocarbon reservoir, wherein the system comprises tubing, an injection pump, and the apparatus according to the second aspect of the invention. In a fourth aspect, the invention relates to use of a surface layer which is repellent towards inorganic material to prevent formation of scale on an electrolytic cell. In a fifth aspect, the invention relates to a method for making an electrolytic cell less susceptible to build-up of scale.
The invention relates to a rope connector (200) for connecting prepared ends (150sp) of two rope segments (150-1, 150-2), wherein said prepared ends (150sp) each comprise a rope eye, wherein the rope connector (200) comprises at least two complementary parts (200-1, 200-2), wherein each of said parts (200-1, 200-2) is configured with a shaped re-cess (210) for receiving at least part of said prepared end (150sp) of a respective one of said rope segments (150-1, 150-2), and wherein said parts (200-1, 200-2) are detachably mountable to each other to establish a firm connection there between that is strong enough to sustain the required tension capacity. The invention further relates to a rope ex-tension system (100) comprising such rope connector (200) and a hoisting system (10) comprises such rope extension system. The invention provides for a more flexible set-up for extending the rope on-site, by simply adding more wire-rope segments via further rope connectors.
F16G 11/06 - Means for fastening cables or ropes to one another or to other objectsCaps or sleeves for fixing on cables or ropes with laterally-arranged screws
19.
ELECTRODE ASSEMBLY, SYSTEM AND METHOD FOR INACTIVATING ORGANIC MATERIAL IN A FLOW OF WATER
There is described an electrode assembly (1) for the production of injection water for a petroleum well by inactivating organic material in a flow of water, the electrode assembly (1) having a longitu-dinal axis (L), and comprising: - at least one electrode unit (2), comprising at least two electrodes (3) whereof at least one anode (3a) and one cathode (3b), the anode (3a) corresponding to and being arranged in close proximity to the cathode (3b), wherein at least a part of the electrode unit (2) is funnel-shaped along the longitudinal axis, and wherein each electrode (3) comprises at least a perforated portion (311, 321) comprising mesh, for water to pass through; - a tubular housing (4) for enclosing the at least one electrode unit (2) and for defining a flow path for the flow of water; the electrode assembly (1) being provided with flow improving means (44) for distributing the flow of water over the perforated portions (311, 321) of the electrodes (3). There is also described a treatment system (10) including such an electrode assembly (1), and a method for inactivating organic material in water.
The invention relates to a hydraulic fluid for offshore use, the hydraulic fluid comprising water, a pour point depressant, a chelant, a friction modifier, and polyvinylpyrrolidone as a thickening agent. The invention further relates to a riser tensioning system comprising the hydraulic fluid.
The present application discloses a device for controlling a passage of fluid in a tubing string. The device comprises a fluid chamber and two pistons for interact-ing with a fluid inside the fluid chamber. Each piston is adapted for catching an object received through the tubing string from an uphole side of the device. Also, at least one of the pistons is adapted for controlling the passage of fluid, and the pistons and the fluid chamber are arranged so that the pistons are directed in the same direction along the tubing string.
E21B 23/04 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
E21B 21/10 - Valves arrangements in drilling-fluid circulation systems
E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
22.
A METHOD FOR INSTALLING AN OFFSHORE WIND TURBINE AND A SUBSTRUCTURE FOR AN OFFSHORE WIND TURBINE
A method of installing an offshore wind turbine (10), the method comprising the step of raising a full-length tower (2) for the offshore wind turbine (10) by moving it longitudinally from a container (11) in a substructure (1), the substructure (1) being a support structure for the wind turbine (10), and a substructure (1) for an offshore wind turbine (10), wherein the substructure (1) is arranged with a container (11) configured for housing a tower (2) for the wind turbine (10) substantially in its entirety.
There is described a tool for positioning a blade for a wind turbine for facilitating installation of the blade, a related an installation assembly, and method. In various embodiments, the wind turbine includes a tower and a rotatable hub on an upper end of the tower, and the tool is mounted on a side of the tower so that the blade is supported on the tower in an initial configuration. The tool may have at least one part and at least one other part, the one part being arranged to be angularly movable relative to the other part for tilting the blade with respect to the tower to position the blade in a position that can allow the blade to be connected to the hub.
F03D 13/10 - Assembly of wind motorsArrangements for erecting wind motors
B66C 1/10 - Load-engaging elements or devices attached to lifting, lowering, or hauling gear of cranes, or adapted for connection therewith for transmitting forces to articles or groups of articles by mechanical means
There is described a device for use in water processing, and related methods. In various embodiments, the device has: housing sections for housing membranes for treating water in the interiors of the housing sections, wherein the interiors of the sections are separate from one another; a feed inlet for supplying the device with water to be treated; an extraction outlet for extracting treated water from the device; a distributor chamber for containing a flow of water to be treated from the feed inlet and distributing the water to be treated into the interiors of the housing sections; and a collector chamber for collecting treated water from the interiors of the housing sections and communicating a merged flow of the treated water to the extraction outlet. The device may be useful particularly in subsea systems.
Disclosed is a device (20) adapted to be run on a tubing string (5) into a wellbore (2). The device comprises at least one inlet (22) for enabling the entry of a fluid into the tubing string, and a close mechanism (40) for closing the at least one inlet. In a configuration for immerging the tubing string in a fluid, the at least one inlet is open for letting that fluid enter the tubing string. Also disclosed is a method of running a tubing string to an intended depth in a wellbore having wellbore fluid inside.
E21B 33/128 - PackersPlugs with a member expanded radially by axial pressure
E21B 34/06 - Valve arrangements for boreholes or wells in wells
E21B 34/14 - Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
26.
APPARATUS FOR SUPPORTING A FLYWHEEL ON A FLOATING VESSEL AND METHODS THEREOF
Disclosed is an apparatus for supporting a flywheel on a floating vessel, the apparatus comprising: a support for the flywheel; at least one tilt sensor for measuring an angle of slope relative to the Earth, the at least one tilt sensor being arranged to detect a change of an angle of slope of the floating vessel relative to the Earth; and at least one driver for manoeuvring the support relative to the floating vessel, based on the measured angle of slope from the at least one tilt sensor, wherein the at least one driver is operable to manoeuvre the support so as to counteract a change of an angle of slope of the flywheel relative to the Earth due to the detected change of an angle of slope of the floating vessel.
B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
B63G 11/00 - Aircraft carriers, i.e. warships equipped with a flight deck on which airplanes can be launched and landed and with a hangar deck for servicing airplanes
H02K 7/02 - Additional mass for increasing inertia, e.g. flywheels
E21B 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables
27.
SYSTEM AND METHOD FOR CALIBRATION OF HYDRAULIC MODELS BY SURFACE STRING WEIGHT
There is disclosed a method for tuning a hydraulic model to be used for estimating down hole dynamic pressure as a function of flow rate, characterized in that the method comprises the steps of : a) selecting a non-tuned hydraulic model estimating the relative magnitude of the pressure losses in various annulus sections of the well bore; b) applying the non-tuned hydraulic model to give a first order estimate of the pressure gradients and the shear stresses at the drill string; c) applying the same non-tuned model to estimate the flow lift area for two different flow rates, where the first flow rate is zero or much lower than the second flow rate being sub- stantially equal to a typical flow rate obtained during drilling; and d) performing a model tuning test where the string is rotated off bottom while said two dif- ferent flow rates are used to obtain corresponding string weights. There is also disclosed a system for carrying out the method as well as computer- readable medium being provided with instructions for carrying out the method.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
E21B 44/06 - Automatic control of the tool feed in response to the flow or pressure of the motive fluid of the drive
28.
ELECTROHYDRAULIC DEVICE, METHOD, AND MARINE VESSEL OR PLATFORM
An electrohydraulic device is described which in certain embodiment has an extender which is arranged to be actuated by hydraulic fluid, and a rotor of an electric motor, the rotor being arranged to rotate about a part of the extender. The rotor typically comprises an annular body which encircles or surrounds said part of the extender. There is also described a re-lated method of use and a marine vessel or platform where the device may be applied.
There is described a crane for running equipment into or out of a well slot in a deck of a marine vessel or rig, a related marine rig or vessel that includes the crane, and related methods. In various embodiments, the crane has a boom configured for conveying a travel unit along the boom on a track. In further embodiments, the travel unit includes a top drive to which a drill string extending through the well slot is attached, the top drive operating to rotate the drill string for drilling a section of a wellbore.
E21B 19/09 - Apparatus for feeding the rods or cablesApparatus for increasing or decreasing the pressure on the drilling toolApparatus for counterbalancing the weight of the rods specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
E21B 15/02 - Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
B63B 27/10 - Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes
B63B 35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
Disclosed is a drilling system for rock drilling with a drill string, wherein the drill string comprises at least one bendable drill pipe, the drilling system comprising at least two block and tackle systems for driving an end of the drill string in a first direction; and at least one conveyor device adapted to guide and bend the drill string between the first direction and a second direction, so as to convert a motion of the drill string between the first direction and the second direction.
There is described a drilling system (1) for drilling a well, the drilling system (1) having a well centre (8) through which a drill string (2) may be run into and pulled out of the well, said drilling system (1) comprising : - a coilable drill string (2); - a first reel (4) for storing said coilable drill string (2); - a drive means for driving said coilable drill string (2) into the well from said first reel (4) and out of the well to said first reel (4); and - a deflection means (6) for directing said coilable drill string (2) between said first reel (4) and into said well centre (8), wherein the drilling system (1) further comprises: - a top drive (28); and in that said coilable drill string (2) is provided with : - a first connection at a first end (46) thereof for connecting the coilable drill string (2) to a bottom-hole-assembly; and - a second connection at a second end (44) thereof for connecting the coilable drill string (2) to said top drive (28). There is also described a method utilizing the drilling system (1) according to the invention.
E21B 19/08 - Apparatus for feeding the rods or cablesApparatus for increasing or decreasing the pressure on the drilling toolApparatus for counterbalancing the weight of the rods
32.
ELECTRODE ASSEMBLY, SYSTEM AND METHOD FOR INACTIVATING ORGANIC MATERIAL IN A FLOW OF WATER
There is described an electrode assembly (1) for inactivating organic material in water, the electrode assembly (1) having a longitudinal axis (L), and comprising: - at least one electrode unit (2), comprising at least two electrodes (3) whereof at least one anode (3a) and one cathode (3b), wherein the electrodes (3) comprise; - a first electrode member (31) comprising a perforated portion (311) for water to pass through; and - a second electrode member (32) arranged at an angle with respect to the first electrode member (31 ), and comprising a perforated portion (321) for water to pass through; wherein the first and second electrode members (31, 32) of the anode (3a) correspond to and are arranged in close proximity to the first and second electrode members (31, 32) of the cathode (3b). There is also described a treatment system (10) including such an eiectrode assembly (1), power distribution (5) means for the electrode assembly as well as a method for inactivating organic mate¬ rial in water.
The invention relates to a drilling unit (100a, 100b) for mounting on a deck (200) of a floating vessel, the drilling unit (100a, 100b) comprising a drill tower structure (130) with a heave-compensation system for compensating vertical movements of the floating vessel due to waves. The drilling unit (100a, 100b) further comprises a winch (110) mounted at or near the deck (200), a crown block (151) mounted at a top side (140) of the drill tower structure (130) and at least one wire rope (120) provided between the winch (110) and the crown block (151). The heave-compensation system comprises a slideable support frame (150) configured to be moved relative to the drill tower structure (130) in a direction substantially parallel to the axial direction of the drill tower structure (130), wherein either the winch (110) or the crown block (151) is provided within the slideable support frame (150) such that a distance between the winch (110) and the crown block (151) is controllable, wherein the position of the slideable support frame (150) with respect to the drill tower structure (130) is controlled by at least one electric motor or linear actuator (171). Alternatively, the crown block may be dispensed with and the winch (110) is placed in the slideable support frame (150) at the top side (140) of the drill tower structure (130). The invention provides a drilling unit with an improved and overall more compact design of a compensation system.
E21B 19/09 - Apparatus for feeding the rods or cablesApparatus for increasing or decreasing the pressure on the drilling toolApparatus for counterbalancing the weight of the rods specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string
F16H 19/04 - Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary motion and reciprocating motion comprising a rack
34.
METHOD OF UPGRADING A KNUCKLE-BOOM CRANE AND A HEAVE-COMPENSATING CRANE
The invention relates to a method of upgrading a knuckle-boom crane (100a) to a heave-compensating crane (100). The method comprises: i) providing a knuckle-boom crane (100a) having a crane base (110), a main boom (121) pivotably mounted to the crane base (110), and a knuckle-boom (130) pivotably mounted to the main boom (121); ii) removing the knuckle-boom (130) from the main boom (121); iii) mounting a main boom extension (122) to the main boom (121) for increasing the length of the main boom (120); iv) mounting a heave-compensating boom (140) at a far end (122e) of the main boom extension (122) such that the heave-compensating boom (140) extends in a downward vertical direction (Z) in operational use of the heave-compensating crane (100), wherein the heave-compensating boom (140) is configured to be pivotable with respect to the main boom extension (122) in both horizontal directions (X, Y) defined with respect to the downward vertical direction (Z), and v) providing a heave-compensation system (110) to the knuckle-boom crane (100a), wherein the heave-compensation system (110) is configured for compensating for horizontal variations by controlling the orientation of the heave- compensating boom (140) relative to the main boom extension (122), and for compensating the vertical variations by means of a further vertical heave-compensation system (110), such as a winch-based heave-compensation system. The invention further relates to such heave-compensated crane as such.
System (10) arranged on a marine vessel (1) or platform, and related method of use. The system in various embodiments has at least one hydraulic actuator (6) coupled to a load (4), the actuator being configured to support the load while allowing compensation for the heave motion of the marine vessel or the platform in the sea (2), where the load is supported via the hydraulic actuator from the marine vessel or platform. The system may in such embodiments include at least one hydraulic accumulator (40); at least one reservoir (54) for hydraulic fluid; at least one controller (60); a transformer (20) comprising at least one power source and at least one hydraulic pump/motor (30a, 30b), for communicating energy between any two of the hydraulic actuator, the hydraulic accumulator, and the power source; and at least one valve (HP1a, HP1b, LP1, HP2a, HP2b) associated with the pump/motor, the valve being switchable during at least one cycle of the pump/motor for selectively providing fluid communication between a drive chamber (34a, 34b) of the pump/ motor and any of the hydraulic actuator, the hydraulic accumulator, and the reservoir, via at least one port of the drive chamber, so as to allow a desired displacement of hydraulic fluid from the pump/ motor to be obtained; the valve being operable under control from the controller.
There is described a fibre rope (1) for offshore lifting operations, said fibre rope (1) comprises a plurality of magnets (8) embedded within the fibre rope (1) with an axial distance therebetween along the fibre rope (1). There is also described a hoisting system (10) including such as fibre rope (1) as well as a method for operating such a hoisting system (10)
G01L 1/12 - Measuring force or stress, in general by measuring variations in the magnetic properties of materials resulting from the application of stress
The invention relates to a method of building an offshore windmill (100) on a windmill pedestal (50) that is located offshore. The method comprises: i) providing a floating vessel (900) comprising a 3D-heave-compensated crane (910) on a deck (901) thereof; ii) providing at least one offshore windmill assembly (110, 120, 130) and a lifting jack (90), wherein the offshore windmill assembly comprises a windmill generator (120), a plurality of wind- mill blades (130, 130-1..130-3) and at least two windmill column parts (110, 110-1..110-3) for forming a windmill column at a later stage, wherein the lifting jack (90) is configured for receiving the windmill column (110-1..110-3) in a receiving region thereof; iii) moving said floating vessel (900), the lifting jack (90) and the at least one offshore windmill assembly (110, 120, 130) in proximity of the windmill pedestal (50); iv) placing the lifting jack (90) directly on the windmill pedestal (50) using the 3D-heave-compensated crane (910) and fixing the lifting jack (90) to the windmill pedestal (50) such that it can be later removed, and wherein the lifting jack (90) is fixed to the windmill pedestal (50) such that the windmill column (110-1..110-3) can be placed within the receiving region directly on the windmill pedestal (50); v) installing the windmill generator (120) using the 3D-heave-compensated crane (910); vi) partially erecting the windmill column (110-1..110-3) on the windmill pedestal (50) using the 3D-heave-compensated crane (910) and the lifting jack (90); vii) installing the windmill blades (130, 130-1..130-3) on the windmill generator (120) using the 3D-heave-compensated crane (910) at a stage where the windmill column (110-1..110-3) has been partially erected; viii) fully erecting the windmill column (110-1..110-3) on the windmill pedestal (50) using at least the lifting jack (90), and ix) removing the lifting jack (90) from the windmill pedestal (50) using the 3D-heave-compensated crane (910). The invention provides for a further improved retrofit method of building offshore windmills.
F03D 13/25 - Arrangements for mounting or supporting wind motorsMasts or towers for wind motors specially adapted for offshore installation
E04H 12/34 - Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
F03D 13/10 - Assembly of wind motorsArrangements for erecting wind motors
E02B 17/00 - Artificial islands mounted on piles or like supports, e.g. platforms on raisable legsConstruction methods therefor
E02B 17/02 - Artificial islands mounted on piles or like supports, e.g. platforms on raisable legsConstruction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
E02B 17/08 - Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
38.
SYSTEMS AND METHODS FOR MANAGING FLUID PRESSURE IN A BOREHOLE DURING DRILLING OPERATIONS
A method for drilling a borehole in an earthen formation using a drilling fluid includes selecting a lower pressure limit and an upper pressure limit for the drilling fluid at a drilling location in the borehole. In addition, the method includes activating a pump to circulate the drilling fluid down a drill string and up an annulus disposed about the drill string. Further, the method includes operating the pump to maintain the drilling fluid at the drilling location at a pressure between the upper pressure limit and the lower pressure limit. Still further, the method includes deactivating the pump to stop circulating the drilling fluid up the annulus. Moreover, the method includes preventing the drilling fluid from flowing up the drill string with a check valve after deactivating the pump. The method also includes closing a control valve at a selected time after deactivating the pump to seal the drilling fluid in the annulus between the check valve and the control valve and maintain the pressure of the drilling fluid at the drilling location between the lower pressure limit and the upper pressure limit.
E21B 21/08 - Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
39.
JACK-UP RIG FOR PERFORMING MULTIPLE INDEPENDENT OPERATIONS SIMULTANEOUSLY
The invention relates to a jack-up rig (100) comprising a cantilever platform (130-1, 130-2) mounted on a buoyant hull (120), wherein at least two drilling assemblies (200-1, 200-2) are provided on the cantilever platform (130-1, 130-2), wherein each of the drilling assemblies (200-1, 200-2) is movable relative to the cantilever platform (130-1, 130-2) and independently from the other drilling assembly or assemblies (200-2, 200-1), respectively, wherein each of the drilling assemblies (200-1, 200-2) is movable within a plane parallel to the cantilever platform (130-1, 130-2) in both X-direction (X) as well as Y-direction (Y) orthogonal to the X-direction (X).
E21B 15/02 - Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
E02B 17/02 - Artificial islands mounted on piles or like supports, e.g. platforms on raisable legsConstruction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
The invention relates to a storage system (300) for tubular structures (200) stacked in layers (201..206).The storage system (300) comprises: i) a mechanical support (310, 310-1, 310-2) configured to be placed on a deck or surface (50) in an orientation extending away from the deck or surface (50), and ii) at least two spacer bars (320, 321 ) mounted to the mechanical support (310, 310-1, 310-2) and extending away from the mechanical support (310, 310-1, 310-2). Each spacer bar (320, 321) has at least a horizontal position in operational use for receiving the tubular structures (200) on top of it. At least an upper one (320-2..320-6) of the at least two spacer bars (320, 321 ) is pivotably mounted to the mechanical support (310, 310-1, 310-2) for allowing rotation away from the deck or surface (50) in operational use to enable delivery and pickup of tubular structures (200) from a respective layer (205) directly underneath the respective spacer bar (320-6) by means of a tubular handling tool (100). The at least two spacer bars (320, 321) are mounted to the at least one mechanical support (310, 310-1, 310-2) at different height from the deck or surface (50) to allow the formation of layers (201..206) of tubular structures (200) spaced apart by the spacer bars (320, 321). Each respective one of the at least two spacer bars (320, 321) is only mounted to the storage system (300) by said mechanical support (310, 310-1, 320-2) on a first end of said spacer bar (320, 321) near the mechanical support (310, 310-1, 320-2), and wherein tubular structures (200) on said spacer bar (320, 321) are accessible by the tubular handling tool (100) approaching from a direction parallel to the spacer bars near a second end, opposite to the first end, of the respective spacer bar (320, 321). The invention enables an unmanned pipe storage area to reduce safety hazards for the personnel on a rig.
The invention relates to a spooling device (200) for facilitating spooling of a wire (99, 99', 99") on a drum winch (300) from a feeding point (fp). The spooling device (200) comprises: a frame (230) and a suspension cradle (210) mounted to the mechanical frame (230). The suspension cradle (210) comprises a rotatable wire sheave (215) for receiving the wire (99, 99', 99") and for guiding the wire (99, 99', 99") to a specific location on the drum winch (300). The suspension cradle (210) with the wire sheave (215) is mounted in a slideable manner to the frame (230) in accordance with a curved path (cp). The curved path (cp) is chosen such that a fleet angle (fa) of the wire (99, 99', 99") coming from the feeding point (fp) is at least partially compensated in order to reduce fringing effects of the wire (99, 99', 99") on the wire sheave (215) during sliding movement of the wire sheave (215) in operational use of the spooling device (200).
A system for moving items on a rig floor (2), the system comprising a plurality of skids (30-35) and a network of rails (10) for guiding the plurality of skids, each skid of said plurality of skids for supporting an item, and each skid having rail engagement members for engaging at least one rail of said network of rails. The rig floor may form part of a drilling rig such as a drill ship (1) used in the construction of oil and gas wells.
A system comprising a drilling rig having a rig floor, a derrick, a master control computer system and at least one camera, the at least one camera capturing a master image of at least a portion of the rig floor, sending the master image to the master control computer, the master control computer system mapping said master image into a model to facilitate control of items on said drilling rig.
E21B 41/00 - Equipment or details not covered by groups
E21B 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables
F16P 3/14 - Safety devices acting in conjunction with the control or operation of a machineControl arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
H04N 13/271 - Image signal generators wherein the generated image signals comprise depth maps or disparity maps
H04N 13/243 - Image signal generators using stereoscopic image cameras using three or more 2D image sensors
G06K 9/62 - Methods or arrangements for recognition using electronic means
44.
Method for placing and removing pipe from a finger rack
A system for placing and removing pipe from a finger rack of a drilling rig, the system comprising a pipe handling apparatus (140) and a finger rack (139) having at least one finger board (102) having at least two fingers (103 to 106) defining a slot (107 to 109) and a multiplicity of latches (114) arranged therebetween defining a space for a pipe, each latch (114) of the multiplicity of latches selectively movable between an open position and a closed position, the system further comprising at least one camera (101) having said at least one latch (114) of said multiplicity of latches in a field of view, capturing an image of said latch and sending said image to a master control computer (12′), said master computer control computer (12′) programmed with a set of instructions to analyze said image for details indicative of the latch (114) being in an open position or closed position, concluding the latch (114) to be in an open position or closed position and allowing or disallowing a pipe handling apparatus to place or remove a pipe in the finger rack (139) based on said conclusion.
There is described a hosting system (1 ) for a drilling rig, the hoisting system comprising: - a wire rope (2); - a winch (4) for pulling in and letting out said wire rope (2); - a support structure, such as a derrick; - a wire rope guiding sheave (6) connected to the support structure, said wire rope guiding sheave (6) being provided between said winch (4) and a load suspension member along the wire rope (2); and - a first stabilizer (8) for damping lateral vibrations of the wire rope (2) between said winch (4) and said wire rope guiding sheave (6), wherein said first stabilizer (8) is provided closer to the wire rope guiding sheave (6) than to the winch (4) along the wire rope (2), There is also described a drilling rig comprising such a hoisting system (1 ) as well as a method for operating the hoisting system (1 ).
B66C 13/06 - Auxiliary devices for controlling movements of suspended loads, or for preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
B66D 1/36 - Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
There is described a system for regenerating and distributing energy on a vessel, the system com¬ prising: - a first power distribution system; and - a second power distribution system electrically isolated from said first power distribution system, wherein said system further comprise a flywheel mechanically connected to both said first and second power distribution systems. There is also described a vessel or a floating offshore installation comprising a system according to the invention as well as a method for regenerating and distributing energy by means of such a system.
There is described a device (1) for tensioning an elongated hoisting member (10), wherein said device (1) comprises: - a first friction-generating member (2) rotatably supported around a first support member (6); - a second friction-generating member (4) rotatably supported around a second sup¬ port member (8), said first and second friction-generating members (2, 4) being adapted to provide friction to the elongated hoisting member (10) when said first and second friction-generating members (2, 4) are pressed against each other with a por- tion of the elongated hoisting member (10) therebetween; and - a braking means (18) for braking the rotation of said first and second friction- generating members (2, 4) around said first and second support members (6, 8). There is also described a system including such a device (1), as well as a method for operating such a system.
There is described a bearing arrangement (1 ) for a bearing wheel (16) in a turret, said bearing ar¬ rangement (1 ) being providable between the bearing wheel (16) and a wheel shaft (1 8) around which the bearing wheel (16) is rotatably connectable, wherein said bearing arrangement (1 ) com¬ prises a slide bearing (28) enabling said bearing wheel (16) to slide axially on said shaft (18), wherein said bearing arrangement (1 ) further comprises a roller bearing (34, 34', 34"). There is also described a bearing system (8) comprising a plurality of bearing arrangements (1 ), a turret (10) comprising such a bearing system (8) as well as a vessel (100) comprising such a turret (10). Finally there is described a method for mounting a bearing arrangement in a bearings system
Methods of controlling an actuator 103 during operation using a hydraulic circuit, and related apparatus, are described. The circuit can comprise a first path section along which fluid is supplied to a first chamber 103a of the actuator using a first valve 110 and a second path section along which fluid is extracted from a second chamber 103b of the actuator using a second valve 111. In various embodiments, pressure data associated with a pressure of the fluid supplied to the first side of the actuator are obtained, a pilot pressure pPilot is produced based on the data and the first and second valves are configured based on the pilot pressurepPilot.
F15B 21/00 - Common features of fluid actuator systemsFluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
There is described a method of determining at least one geometrical characteristic of a structure, and related methods, apparatus, and a ship. In embodiments of the invention, the structure comprises a number of tank wall plates. In such embodiments, the number of tank wall plates is defined, and the geometrical characteristic, including the overall length and breadth of the structure is determined, based upon the number of tank wall plates.
B63B 9/00 - Methods of designing, building, maintaining, converting, refitting, repairing, or determining properties of, vessels, not otherwise provided for
B63B 25/12 - Load-accommodating arrangements, e.g. stowing or trimmingVessels characterised thereby for bulk goods fluid closed
There is described an offshore lifting crane (1) comprising : - a support structure (2); - a crane boom (4) connected to said support structure (2); - a winch drum (6) rotatable around a longitudinal axis (L) thereof; - a winch drum drive means (8); and - an elongated hoisting member (10) having a first end connected to said winch drum (6) and a second end connectable to a load, said elongated hoisting member (10) ex¬ tending over at least a part of said crane boom (4), wherein said winch drum (6) is arranged such that said longitudinal axis (L) thereof is substantially vertical. There is also described a vessel (30) comprising an offshore lifting crane (1).
The described winch drum device (1) comprises a first winch drum (11) with an outer surface (111) adapted to accommodate a plurality of axially displaced turns (31) of wire rope (3, 3', 3", 3"'), wherein the winch drum device (1) is provided wire rope storage means (5), such as a recess, extending at least partially radially in from said outer surface (111) of the first winch drum (11), and where said wire rope storage means (5) is adapted to accommodate one or more layers (33) of the wire rope. There is also described a winch comprising a winch drum device according to the invention.
There is described a system (1) for hoisting load on an offshore drilling rig, the system (1) comprising: - a hoisting means including an elongated hoisting member (3) and an elongated hoisting member drive means (5); - a drill string rotation means (7) suspended from an end of said elongated hoisting member (3); - a support structure (9) having a first side (91) and a second side (93), the support structure (9) being adapted to support at least a portion of the weight said drill string rotation means; and - a first elongated hoisting member guiding means (11) connected to said support structure (9), said elongated hoisting member (3) being reeved over said elongated hoisting member guiding means (11) from said from said first side (91) to said second side (93) of the support structure (9), wherein: - said drill string rotation means (7) is suspended from said elongated hoisting member (3) at said first side of the support structure (9); and - the system further comprises a counterweight (15) connected to said elongated hoisting member (3) at said second side (93) of the support structure (9).
E21B 15/02 - Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
E21B 19/084 - Apparatus for feeding the rods or cablesApparatus for increasing or decreasing the pressure on the drilling toolApparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables
The invention relates to a system (1) for storing and handling pipes (5) between a pipe rack and a derrick. The system comprises: i) a plurality of receiving chambers (22a, 22b) for receiving said pipes (5), wherein said receiving chambers (22a, 22b) are positioned around a centre region (30c), and ii) an elevator (30) for lifting and descending said pipes (5) into said chambers (22a, 22b). The elevator (30) is located in the centre region (30c) in between said plurality of receiving chambers (22a, 22b), and that the elevator (30) is configured for selecting one of said plurality of receiving chambers (22a, 22b) and for lifting and descending a respective pipe (5) within said respective chamber (22a, 22b). The invention saves a lot of space, which is very costly on a rig. Furthermore, it also renders the design of the system much easier in comparison with the known systems. The invention also facilitates a faster build-up of pipe stands.
A system comprising a drilling rig having a rig floor, a derrick, a master control computer system and at least one camera, the at least one camera capturing a master image of at least a portion of the rig floor, sending the master image to the master control computer, the master control computer system mapping said master image into a model to facilitate control of items on said drilling rig.
E21B 19/00 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrickApparatus for feeding the rods or cables
F16P 3/14 - Safety devices acting in conjunction with the control or operation of a machineControl arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
A system comprising a drilling rig having a rig floor, a derrick, a master control computer system and at least one camera, the at least one camera capturing a master image of at least a portion of the rig floor, sending the master image to the master control computer, the master control computer system mapping said master image into a model to facilitate control of items on said drilling rig.
F16P 3/14 - Safety devices acting in conjunction with the control or operation of a machineControl arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
G06K 9/00 - Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
57.
A METHOD FOR PLACING AND REMOVING PIPE FROM A FINGER RACK
A system for placing and removing pipe from a finger rack of a drilling rig, the system comprising a pipe handling apparatus (140) and a finger rack (139) having at least one finger board (102) having at least two fingers (103 to 106) defining a slot (107 to 109) and a multiplicity of latches (114) arranged therebetween defining a space for a pipe, each latch (114) of the multiplicity of latches selectively movable between an open position and a closed position, the system further comprising at least one camera (101) having said at least one latch (114) of said multiplicity of latches in a field of view, capturing an image of said latch and sending said image to a master control computer (12'), said master computer control computer (12') programmed with a set of instructions to analyse said image for details indicative of the latch (114) being in an open position or closed position, concluding the latch (114) to be in an open position or closed position and allowing or disallowing a pipe handling apparatus to place or remove a pipe in the finger rack (139) based on said conclusion.
A system for placing and removing pipe from a finger rack of a drilling rig, the system comprising a pipe handling apparatus (140) and a finger rack (139) having at least one finger board (102) having at least two fingers (103 to 106) defining a slot (107 to 109) and a multiplicity of latches (114) arranged therebetween defining a space for a pipe, each latch (114) of the multiplicity of latches selectively movable between an open position and a closed position, the system further comprising at least one camera (101) having said at least one latch (114) of said multiplicity of latches in a field of view, capturing an image of said latch and sending said image to a master control computer (12'), said master computer control computer (12') programmed with a set of instructions to analyse said image for details indicative of the latch (114) being in an open position or closed position, concluding the latch (114) to be in an open position or closed position and allowing or disallowing a pipe handling apparatus to place or remove a pipe in the finger rack (139) based on said conclusion.
There is described a chain stopper (1) being connectable to a support structure (2) and comprising : - a chain locking portion (11) for automatically engaging a first chain link (31) of a chain (3) so as to prevent the chain (3) from being pulled in a first direction (Dl), wherein said chain stopper (1) further comprises: - an activation portion (13) connected to said chain locking portion (11), where said activation portion (13), upon pulling said chain (3) in a second direction (D2), is adapted to be engaged by said chain (3) so as to disengage said chain locking portion (11) from said first chain link (31) allowing said chain (3) to be pulled in said second direction. There is also described a chain stopper assembly (10) comprising a chain stopper (1) as described above.
A system for moving items on a rig floor (2), the system comprising a plurality of skids (30 - 35) and a network of rails (10) for guiding the plurality of skids, each skid of said plurality of skids for supporting an item, and each skid having rail engagement members for engaging at least one rail of said network of rails. The rig floor may form part of a drilling rig such as a drill ship (1) used in the construction of oil and gas wells.
A system for moving items on a rig floor (2), the system comprising a plurality of skids (30 - 35) and a network of rails (10) for guiding the plurality of skids, each skid of said plurality of skids for supporting an item, and each skid having rail engagement members for engaging at least one rail of said network of rails. The rig floor may form part of a drilling rig such as a drill ship (1) used in the construction of oil and gas wells.
There is described a method for estimating downhole speed and force variables at an arbitrary location of a moving drill string (13) based on surface measurements of the same variables, wherein the method comprises the steps of: a) using geometry and elastic properties of said drill string (13) to calculate transfer functions describing frequency-dependent amplitude and phase relations between cross combinations of said speed and force variables at the surface and downhole; b) selecting a base time period; c) measuring, directly or indirectly, surface speed and force variables, conditioning said measured data by applying anti-aliasing and/or decimation filters, and storing the conditioned data in data storage means which keep said conditioned surface data measurements at least over the last elapsed base time period, d) when updating of said data storage means, calculating the downhole variables in the frequency domain by applying an integral transform, such as Fourier transform, of the surface variables, multiplying the results with said transfer functions, applying the inverse integral transform to sums of coherent terms and picking points in said base time periods to get time-delayed estimates of the dynamic speed and force variables.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
There are described methods for controlling the direction of a wellbore (1) trajectory during directional sliding drilling by means of a drill string having a drill bit rotatable, by means of a mud motor, around a drill bit rotation axis at its lower end, the direction of the drill bit rotation axis defining a tool face, wherein one of the methods comprises the following steps: • a2) obtaining data indicative of the torque of the mud motor; and • b2) calculating a reactive twist angle of the drill string by multiplying the obtained torque from step a2) by the torsional drill string compliance, wherein the method further comprises the step of : • c2) rotating the drill string, by means of a drill string rotation means, an angle substantially equal to but in the opposite direction of the calculated reactive twist angle. There are also described systems for executing the methods as well as computer program products comprising instructions for causing a processor to perform the methods as described herein.
System for automatic routing of chemicals related to drilling fluids, the system comprising: • - a plurality of equipment, including a source (3) and a destination (5); • - one or more possible paths (PI, P2) between said source (3) and said destination (5); • - a process control unit (4) being adapted communicate with one or more of said plurality of equipment; and • - a routing control unit (2), the routing control unit being adapted to communicate with the process control unit (4), wherein said routing control unit (2) is provided with control algorithms for finding an optimum path (PI) between said source (3) and said destination (5) based at least partially on feedback from said process control unit (4).
There is described a system (1) for hoisting a load (7) on an offshore rig, the system (1) comprising - a winch (2) having a winch drum (23); - drive means (3) for operating said winch (2); - one or more sheaves (51a, 53a), - an elongated hoisting member (21, 21', 21'', 21'''), such as a wire rope, adapted to run over said one or more sheaves (51a, 53a) and to connect said winch (2) to a load (7), wherein said winch drum (23), in a first position of use (A), is adapted to accommodate a single layer of said elongated hoisting member (21, 21', 21'', 21''').
B66C 1/00 - Load-engaging elements or devices attached to lifting, lowering, or hauling gear of cranes, or adapted for connection therewith for transmitting forces to articles or groups of articles
B66D 1/00 - Rope, cable, or chain winding mechanismsCapstans
B66D 1/36 - Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
B66D 1/64 - Rope, cable, or chain winding mechanismsCapstans adapted for special purposes for actuating grab buckets by means of a single rope or chain
66.
METHOD AND APPARATUS FOR REAL-TIME FLUID COMPRESSIBILITY MEASUREMENTS
There is described an apparatus (1) for measuring the compressibility (K) of a fluid being circulated by a positive displacement pump (10), the apparatus (1) comprising: - a pressure sensing devise (5) for sensing a pressure P of a fluid confined in a fluid module (2) of the positive displacement pump (10); - a position sensing device (7) for sensing the position X, directly or indirectly, of a piston (25) in the fluid module (2) of the positive displacement pump (10), wherein the apparatus (1) further comprises a control unit communicating with said pressure sensing device and said position sensing device, the control unit being adapted to: - log said pressure (P) and said piston position (X) substantially synchronously; - by means of the logged piston position (X) calculate the volume of the confined fluid in the fluid module (2) of the positive displacement pump (10); and - by means of the logged pressure (P) and calculated volume (V), calculate the compressibility (K) of the fluid. There is also described a method for measuring the compressibility (K) of a fluid by means of an apparatus according to the present invention.
E21B 49/00 - Testing the nature of borehole wallsFormation testingMethods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
E21B 21/08 - Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
There is described a coupler device (1) for coupling first and second pipe bodies, the coupler device comprising: - a first connector hub (13a) adapted to be connected to the first pipe body; - a second connector hub (13b) adapted to be connected to the second pipe body; - a clamp adapted to clamp the first and second connector hubs (13a, 13b) together, the clamp comprising two or more clamping members (11); and - two or more clamping rods (15), along which the clamping members (11) are adapted to be displaced, wherein the at least two clamping rods (15) are rigidly connected to the first connector hub (13a). There is also described a method using a coupler device (1) according to the invention.
There is described a connecting device (1) for connecting first and second elongated members (2, 4), the connecting device (1) comprising: - a first connecting member (3) adapted to be connected to the first elongated member (2); - a second connecting member (7) adapted to be connected to the second elongated member (4); and - a link member (5) for connecting the first and second connecting members (3, 7) together, wherein the connecting device (1) is formed with a maximum diameter (D) substantially equal to the diameter of the first and second elongated members (2, 4). There is also described a method for connecting first and second elongated members (2, 4) by means of a connecting device (1) according to the invention.
F16G 11/09 - Fastenings for securing ends of driving-cables to one another, the fastenings having approximately the same diameter as the cables incorporating hinge joints or pivots for the attachment of the cable ends
B63B 21/20 - Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
B66C 13/00 - Other constructional features or details
A die holder device for oilfield use and a method for operating same where a die holder (34), that has an axial centre line (40), is adapted to receive a clamp die (24) and where the die holder (34) is included in a clamp arm (12, 16) or slide block (20), wherein the die holder (34) is restricted from axial movement by at least a first complete or partial conical surface (48) or a second complete or partial conical surface (54) that directly or indirectly bears against the clamp arm (12, 16) or the slide block (20).
A tow line controlling device (1) and a method of operation of a tow line controlling device (1) where the tow line controlling device (1) is positioned in a deck (4) of a vessel where the tow line controlling device (1) includes at least two tow pins (6) that are movable between a passive position and at least one active position, and where a gap between two of the tow pins (6) is spanned by a bridge (12) at least when the tow pins (6) are in one of their active positions, wherein a lower stopper (18) that is movable between a passive position and at least one active position, is positioned between two of the tow pins (6).
There is described a supporting device (1) for one or more cables (2, 2', 2", 2"'), where at least one end of each (2, 2', 2", 2"') cable is connected to moving machinery (4), wherein the supporting device comprises: - two or more substantially parallel, spaced apart, flexible side bands (11); - a plurality of interconnectors (13), each interconnector (13) connecting two or more side bands, wherein the supporting device (1) is provided with fastening means (15, 15') for fastening cables (2, 2', 2", 2"') to at least some of the interconnectors (13). There is also described a method for supporting one or more cables (2, 2', 2", 2"').
A method and system of reducing or avoiding at least axial or torsional oscillations in a drillstring (24) with a bit (26) attached to its lower end and controlled by a hoisting (8) and rotation (6) mechanism attached to its top end, where the controllable variables are vertical and rotational speeds and the response variables are axial tension force and torque, referred to the top of the drillstring (24), wherein the method includes the steps of: i) choosing at least one string oscillation mode to be controlled; ii) monitoring the controllable variable and response variable relevant for said oscillation mode; iii) determining the oscillation period of said mode; iv) estimating from the relevant response variable the dynamic bit speed of said mode; v) determining a speed pulse capable of generating an oscillation with an amplitude substantially equal to the amplitude of said estimated bit speed; and vi) starting an open-loop controlled speed variation by adding said speed pulse to the operator set speed command when the amplitude of said bit speed estimate exceeds a certain threshold level and the anti-phase of said bit speed estimate matches the phase of the pulse generated oscillation.
E21B 44/00 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systemsSystems specially adapted for monitoring a plurality of drilling variables or conditions
E21B 41/00 - Equipment or details not covered by groups
73.
APPARATUS AND METHOD FOR TRANSFERRING ELECTRICAL POWER TO A ROTATING SHAFT
There is described an apparatus (2) for transferring electrical power to a rotating shaft (13, 43), the apparatus (2) comprising : - a first winding (21) in a stationary part of the apparatus (2) around the shaft (13, 43); - a second winding (23) on the shaft (13, 43) adjacent to the first winding (21), characterised in that apparatus further comprises: - a sensing device (48) adapted to sense the rotational frequency of the shaft ((13, 43); and - a variable frequency drive (45) adapted to adjust an input current frequency to the first winding (21) as a function of the rotational frequency of the shaft ( 13, 43), whereby a desired output voltage and frequency in the second winding (23) on the shaft (13, 43) can be obtained. There is also described a method for transferring electrical power to a rotating shaft (13, 43).
H02M 5/12 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers for conversion of voltage or current amplitude only
A clamping system (210) for making and breaking threaded connections between a first tubular and a second tubular comprises a clamp assembly- The clamp assembly includes a first cam gear (220), a first plurality of clamp members (240) disposed within the first cam gear, and a torque gear (250). Each clamp member is pivotally coupled to the torque gear. Each clamp member is configured to pivot between a withdraw position radially spaced apart from the first tubular and a gripping position engaging the first tubular. In addition, the clamping system comprises a clamp actuator. The clamp actuator includes a mounting shaft (264), a first clamp drive gear (280x) rotatably coupled to the mounting shaft, and a torque drive gear (280y) rotatably coupled to the mounting shaft. The first clamp drive gear is configured to rotate the first cam gear and the torque drive gear is configured to rotate the torque gear.
Guide system (130) and method of operation of same for a torque device (1) for guiding a first torque device member (10) relative to a second torque device member (68), each of the torque device members (10, 68) having an operational axis (34) of rotation and three clamp bodies (22, 24, 26) spaced about the operational axis (34), wherein the clamp bodies (22, 24, 26) are movable between a retracted passive position and an extended active position, wherein one of the torque device members (10, 68) has a guide ring (132) and the other of the torque device members (10, 68) has at least two guide elements (140, 142, 144), each guide element (140, 142, 144) being movable with one of the clamp bodies (22, 24, 26) of the respective torque device member (10, 68), wherein when the clamp bodies (22, 24, 26) of the respective torque device member (10, 68) are in their retracted positions, the guide elements (140, 142, 14.4) abut or are proximal to the guide ring (132) and wherein when the clamp bodies (22, 24, 26) of the respective torque device member (10, 68) are in their extended positions, the guide elements (140, 142, 144) are distal the guide ring (132).
Tally system (320) and method of operation of same for oilfield use where the tally system (320) includes information related to a first and second pipe (4, 6) having a tool joint (2), wherein at least torque or torque-turn data related to the tool joint (2) is included in the tally system (320).
A die retainer system and method for a clamp die (152) that is included in a torque devise (1) for oil field use where the clamp die (152) is positioned in a clamp fixture (154), wherein the clamp die (152) is movable in its axial direction relative the clamp fixture (154) and retained in the axial direction by a die retainer (150) that is compliant or compliantly suspended.
Apparatus and method for positioning a pipe in a torque device (1) for oilfield use where the cross sectional dimension of the pipe varies between operations, and where at least a first, second and third clamp bodies (22, 24, 26) are movable between a passive retracted position ( 212, 214) and an active extended position (194, 198, 202, 204, 206, 208) where the clamp bodies (22, 24, 26) engage with the pipe, wherein at least one of a first distance (I) or second distance (II) between the retracted position (212) and active extended position (194, 198, 202) of the first clamping body (22) or the second clamping body (24), is different from a third distance (III) between the retracted position (214) and the active extended position (204, 206, 208) of the third clamping body (26), and where the individual operational speeds of movement of the clamping bodies (22, 24, 26) are set at a ratio where each clamping body (22, 24, 26) at the same time moves a distance (I, II, III) that equals the distance between their point of contact (194, 198, 202, 204, 206, 208) with one of the larger, medium or smaller diameter pipe (186, 188, 190), and their point of contact (194, 198, 202, 204, 206, 208) with another of the larger, medium or smaller diameter pipe (186, 188, 190).
Apparatus and method for positioning a first clamp body (22) relative a pipe in a torque device (1) for oilfield use, wherein the first clamp body (22) that includes a first clamp arm (27), is pivotably coupled to a first clamp pin (28), where the first clamp pin (28) is coupled to the torque de- vice (1) via a turnable bearing (232), and where the first clamp pin (28) is eccentric relative a bearing axis (234).
Control equipment for a torque device (1) for oil field use and method of operation of same where the torque device (1) includes a first torque device member (10) that has an operational axis (34) of rotation, and where a first torque actuator (42) is pivotally connected to the first torque device member (10) at a first radial distance (46) from the operational axis (34) of rotation, wherein a second torque actuator (66) is pivotally connected to the first torque device member (10) at a second radial distance (54) on the opposite side relative the first radial distance (46) from the operational axis (34) of rotation, and where the first torque actuator (10) is pivotally connected to a first portion (56) of a torque element (58), and where the second torque actuator (66) is pivotally connected to a second portion (60) of the torque element (58), and where the torque element (58) is radially movable relative the operational axis (34) of rotation, but is restricted from rotating about an element axis (62), and where the second torque actuator (66) is lockable or adjustable in the relation to the first torque actuator (42).
Apparatus and method for determining at least the torque or rotational position of a first torque device member (10) of a torque device (1) for oilfield use having an operational axis (34) of rotation and where the first torque device member (10) has a first torque actuator (42) that is pivotably connected to the first torque device member (10) at a first radial distance (46) from the operational axis (34) of rotation, wherein a rod (50) or a second torque actuator (66) is pivotably connected to the first torque device member (10) at a second radial distance (54) on the opposite side relative the first radial distance (46) from the operational axis (34) of rotation, and where the first torque actuator (42) is pivotably connected to a first portion (56) of an actuator support (58), and where the rod (50), alternatively the second torque actuator (66), is pivotably connected to a second portion (60) of the actuator support (58) and where a position sensor (250, 252, 255) is designed to give a computable signal that reflects the operational angle of the first torque device member (10).
Apparatus and method for torque compensation of a first torque device member (10) of a torque device (1) for oilfield use having an operational axis (34) of rotation and where the first torque device member (10) has a first torque actuator (42) that is pivotally connected to the first torque device member (10) at a first radial distance (46) from the operational axis (34) of rotation and where there under pivoting of the first torque device member (10) is a change in moment arm (266), wherein a rod (50) or a second torque actuator (66) is pivotally connected to the first torque device member (10) at a second radial distance (54) on the opposite side relative the first radial distance (46) from the operational axis (34) of rotation, and where the first torque actuator (42) is pivotally connected to a first portion (56) of an actuator support (58), and where the rod (50), alternatively the second torque actuator (66), is pivotally connected to a second portion (60) of the actuator support (58) and where the rotational position about the operational axis (34) of first torque device member (10) is determinable by use of at least one position sensor (250, 252, 255) that is connected to a calculating unit (260) where the calculating unit (260) is programmable to calculate the change in actuator force to compensate for the change in -moment arm (266).
Apparatus and method for determining the axial profile of at least a first or second pipe (4, 6) for oil field use, wherein a sensor tip (292) is biased against the first or second pipe (4, 6) and where a linear sensor (292) is designed to give a signal that reflects the change in radial dimension as the first or second pipe (4, 6) and the sensor tip (292) are moved relative each other with at least one motion component in the axial direction of the first or second pipe (4, 6).
A torque device (1) and operational method for oil field use that includes a first torque device member (10) that has an operational axis (34) of rotation, and where a first torque actuator (42) is pivotally connected to the first torque device member (10) at a first radial distance (46) from a centre line (48) of the first torque device member (10), wherein a rod (50) or a second torque actuator (66) is pivotally connected to the first torque device member (10) at a second radial distance (54) extending in the opposite direction relative the first radial distance from the centre line (48), and where the first torque actuator (42) is pivotally connected to a first portion (56) of an actuator support (58), and where the rod (50), alternatively the second torque actuator (66), is pivotably connected to a second portion (60) of the actuator support (66), and where the actuator support (66) is radially movable relative the operational axis (34), but is restricted from rotating in a plane (XY) that is perpendicular to the operational axis (34).
A winch drum (11) comprising a cylindrical drum shell (2) having a radially inner surface (10), a radially outer surface (9) and a separate reinforcement layer (4; 5) which can comprise plastic applied to at least one of said surfaces.
Method and device for preventing a primary relief valve (12) in a mud system (1) from opening at a pressure lower than a nominal opening pressure, and where the mud system (1) includes a mud pump (2), wherein the method includes: - installing an flow restrictor (16) between the mud pump (2) and the primary relief valve (12); and -providing a cavity (20) between the flow restrictor (16) and the primary relief valve (12).
A method for detecting and localizing a valve leak in a piston machine (1) having a shaft 24, where the method includes: - attaching at least one vibration sensor (16', 16", 16''') to a valve block (14', 14", 14'''), of the piston machine (1); - measuring the vibrations from all vibration sensors (16', 16", 16'''); - attaching a sensor (22) to the piston machine (1) where the sensor is designed to produce, directly or indirectly, an angular shaft position signal for the shaft (24), and where the method further includes: - determining, directly or indirectly, an angular shaft position signal for the shaft (24); - transforming the vibration signals from all vibration sensors (16', 16", 16''') into one envelope signal representing the instant vibration level; - using the window functions to find sector based averages of the vibration level, and - comparing said averages with a critical ambient vibration level to detect and localize leaks in one or two valves.
G01M 3/24 - Investigating fluid tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
F04B 51/00 - Testing machines, pumps, or pumping installations
G01H 1/00 - Measuring vibrations in solids by using direct conduction to the detector
According to the present invention, there is provided a heave compensating system for a marine vessel, the system being configured to maintain a substantially constant support force on a load suspended from the vessel despite heaving movement of the vessel. The system comprises a hydraulic actuator arranged for connection between the vessel and a load to be suspended from the vessel, the actuator being hydraulically actuable to vary the distance between the load and the vessel in response to heaving motion of the vessel. The hydraulic actuator is fluidly connected to a first hydraulic machine for actuation by the first hydraulic machine. The system further comprises a second hydraulic machine in fluid connection with a hydraulic accumulator. The first and second hydraulic machines are mechanically connected to one another and also both mechanically connected to a shared electric motor. The system further comprises a controller arranged to control hydraulic movement of the first and second hydraulic machines and to control the supply of power to the electric motor in response to one or more signals representative of a wave-induced heave movement of the vessel and/or a wave induced force applied to the load.
Summary A lifting tool (1) for opposing twisting of generally submerged ropes (6, 12) the lifting tool (1) comprising a body (30) with a centre axis (48), and having an operable lock (32) that is adapted to catch a rope connector (16, 32), and a structure (46) that is designed to be connected to a hoist or crane (2), wherein the lifting tool (1) is equipped with at least one water flow inducing means positioned at a radial distance from the centre axis (48).
A system for storing one or more tubulars comprises a drilling deck (14) including a hole (17) offset from a wellbore centerline (18). In addition, the system comprises a rack unit (100) coupled to the drilling deck and extending downward from the hole in the drilling deck. The rack unit comprises a tubular housing (111) having a longitudinal axis, an upper end, and a lower end opposite the upper end. The rack unit also comprises a first rack (200) disposed within the housing, wherein the first rack is moveably coupled to the housing.
Summary A capture basket system (1) for use below an underdeck pipehandling machine (16) on a drill rig (8), where the capture basket system (1) includes a capture basket (2) that is designed to retain a falling object (30) such as a pipe, wherein the capture basket (2) is connected to a structure (6) of the drill rig (8) by means of energy absorbing means that includes an elongated element (4).
An apparatus (16) and method for recuperation of hydraulic energy from an actuator (6) where a first drive (22) of a first hydraulic machine (18) and a second drive (26) of a second hydraulic machine (20) are mechanically connected, and where the first hydraulic machine (18) is in hydraulic communication with an actuator (6), and where the second hydraulic machine (20) is in hydraulic communication with an accumulator (34).
A method and a device for treating pipe string sections (4), several pipe string sections (4) being in a set-back (2) and the pipe string sections (4) being arranged a vertical position, and the method comprising : - arranging a remote-controllable manipulator (6) at least at one of the threaded portions (24) of the pipe string sections (4); - providing the remote-controllable manipulator (6) with a tool (22), the tool (22) being arranged to at least clean or lubricate said threaded portion (24); and - moving the tool (22) to a threaded portion (24) which is to be treated and at least clean or lubricate the threaded portion (24).
A method for reducing resonant vibrations and dynamic loads of cranes (1), whose horizontal and vertical motion of the pay load (38) are controlled by a boom winch (24) controlling the luffing motion of a pivoting boom (16) and a hoist winch (36) controlling the vertical distance between a boom tip (30) and the load (38), and where the method includes the steps of: - determining the resonance frequencies of the coupled crane boom (16) and load (38) system, either experimentally or theoretically at least from data on inertia of the boom (16) and stiffness of at least a boom rope (18), a hoist rope (26), a pedestal (6) and an A-frame (19); - automatic generation of a damping motion in at least one of said winches (24, 36), that counteract dynamic oscillations in the crane (1); and - adding this damping motion to the motion determined by a crane operator.
B66C 13/02 - Devices for facilitating retrieval of floating objects, e.g. for recovering craft from water
B66C 13/06 - Auxiliary devices for controlling movements of suspended loads, or for preventing cable slack for minimising or preventing longitudinal or transverse swinging of loads
The invention relates to a sack cutting means (10) for offshore emptying of content from a package, comprising a means (11) for cutting up the package, means (21) for separating the package from its content and means (20) for removing the emptied package from the cutting means, said means (21) for separating the content at least from the package comprising means (13) for ripping the package open, one or more transporting means and a rotating drum (21) provided with openings through which the content separated from the package is allowed to leave the drum (18). Further, the sack cutting screw (11) is separated from the drum (18) and that below both the sack cutting screw (11) and the drum (17), a means (20) for collecting and transporting away the content of the sacks is arranged, said means being configured in such way that the content of the package is removed at one end, while the waste package is removed at the other end of said sack cutting means (10).
A method and a device for hoisting an item (22) at sea, comprising: - by means of a a hoisting device (2), moving the item (22) between different height levels and alternately carrying the item (22) by at least two hoisting ropes (10, 14) comprising a first hoisting rope (10) and a second hoisting rope (14); - arranging the at least two hoisting ropes (10, 14) to extend in parallel along at least part of the distance between the item (22) and the hoisting device (2); - releasably connecting the first hoisting rope (10) to the second hoisting rope (14); and - suspending the second hoisting rope (14) from a hanger (32) when the second hoisting rope (14) is to carry the load of the item (22), the hanger (32) being connected to the hoisting device (2), which is comprised of a crane (4).
A mouse hole damper device (1) positioned at the bottom portion (4) of a mouse hole pipe (2), the mouse hole damper (1) being arranged to dampen an impact from an object (28) falling in the mouse hole pipe (2), and the mouse hole damper (1) including a material (36) which has been worked into forming walls around elongated openings (34), and the mate-rial (36) being arranged in such a way that the openings (34) are, in the main, parallel to the longitudinal axis (13) of the mouse hole pipe (2).
A pipe (28) centering means (1) located in a mousehole (2), the centering mechanism (1) comprising at least one inflatable bladder (20) that is expandable between an inactive, withdrawn position and an active, expanded position, by means of a pressure fluid.
a) to the passive cylinder side, while the control unit regulates the output of the pump unit. The hydraulic system further comprises an accumulator (11) which equalizes the volumetric difference between the two sides of the hydraulic cylinder when it is a common double-acting cylinder. The system may also be provided with a hydraulic transformer (23) for regeneration of hydraulic power during passive operation of the compensation system.
A hydraulic clamping device (1), wherein a clamping piece (4) is supported in a structure (2), and wherein a cylinder housing (36) of a hydraulic cylinder (26) is fixedly connected to the structure (2), the hydraulic cylinder (26) being arranged to exert, along a longitudinal axis (42) of the cylinder (26), a force against the clamping piece, and wherein a piston (32) in the hydraulic cylinder (26) is isolated from the clamping piece (6) with respect to forces acting perpendicularly relative to the longitudinal axis (42).
