This invention relates to a method of determining a grip coefficient in a wellhead system. The method comprises: forming a test block having opposite side surfaces including a ridged profile, the test block being made from the same material as at least an outer surface of an inner tubular member of a wellhead system; gripping the test block between two gripping plates so as to form an interface between each of the side surfaces and a test face of a respective one of the gripping plates, the test face being made from the same material as at least an inner surface of an outer tubular member of a wellhead system; applying a gradually increasing load to the test block in a direction parallel to a plane of the interface; continuously monitoring relative movement between the test block and the gripping plate at the interfaces; determining the applied load at which slip between the test block and the gripping plates occurs; and determining the grip coefficient by calculating the ratio of the applied load to the gripping force at the time slip occurs.
The present invention provides a method of calculating the load capacity of a wellhead system. The method comprises determining a first contact stress at a first interface between an annular component and a collar and equating a radial deflection of an inner surface of the annular component with a radial deflection of an outer surface of the collar. The method uses a first contact stress and the axial movement of the annular component to determine a contact stress at a gripping interface between a gripping surface and an inner tubular member. The method also equates a radial deflection of the outer surface of the inner tubular member with (i) a radial deflection of the gripping surface plus (ii) a depth of penetration of a ridge of the outer surface of the inner tubular member into the gripping surface (iii) a radial dimension of an initial gap between the outer surface of the inner tubular member and the inner surface of the outer tubular member.
The present invention provides a method of calculating the load capacity of a wellhead system. The method comprises determining a first contact stress at a first interface between an annular component and a collar and equating a radial deflection of an inner surface of the annular component with a radial deflection of an outer surface of the collar. The method uses a first contact stress and the axial movement of the annular component to determine a contact stress at a gripping interface between a gripping surface and an inner tubular member. The method also equates a radial deflection of the outer surface of the inner tubular member with (i) a radial deflection of the gripping surface plus (ii) a depth of penetration of a ridge of the outer surface of the inner tubular member into the gripping surface (iii) a radial dimension of an initial gap between the outer surface of the inner tubular member and the inner surface of the outer tubular member.
This invention relates to a method of determining a grip coefficient in a wellhead system. The method comprises: forming a test block having opposite side surfaces including a ridged profile, the test block being made from the same material as at least an outer surface of an inner tubular member of a wellhead system; gripping the test block between two gripping plates so as to form an interface between each of the side surfaces and a test face of a respective one of the gripping plates, the test face being made from the same material as at least an inner surface of an outer tubular member of a wellhead system; applying a gradually increasing load to the test block in a direction parallel to a plane of the interface; continuously monitoring relative movement between the test block and the gripping plate at the interfaces; determining the applied load at which slip between the test block and the gripping plates occurs; and determining the grip coefficient by calculating the ratio of the applied load to the gripping force at the time slip occurs.
A crown plug for a tree of an oil/gas well/wellhead has a securement arrangement for securing the crown plug within the tree. The main body of the crown plug comprises a solid body creating the barrier within the production bore. The solid body creates a robust, strong and reliable barrier. The crown plug is retained within the outer member through inward distortion which secures the crown plug. The securement arrangement arises from an inward radial force that distorts the outer member inwardly to grip a component located within the outer member. The outer member elastically deforms and the outer member returns to a released position once the clamping force is released. Two concentric oppositely arranged tapered surfaces move axially to create the inwardly directed force. The clamping force and the solid body together provide an improved crown plug which is easy and reliable to operate.
A pressure energised seal for a wellhead, in particular, provides a seal of an annulus between an inner wellhead casing member and an outer wellhead casing member. The wellhead incorporates a clamping arrangement whereby the outer member is arranged to be deflected radially inwardly in order to grip and secure the inner member within the bore of the outer member. Also, a seal for use in such a clamping arrangement. In particular, the seal includes a sealing lip which locates within a groove provided in the outer clamping surface of the inner member. A seal is activated and created as the outer member is clamped inwardly since this causes the outer member to compress the inner member and to reduce the diameter of the inner member. Also, a well and a method of sealing an annulus in a well.
The present invention relates to a crown plug (10) for a tree of/associated with an oil/gas well/wellhead and a securement arrangement (50) for securing the crown plug (10) within the tree. The main body (12) of the crown plug (10) comprises a solid body to create the barrier within the production bore. The solid body thereby creates a robust, strong and reliable barrier. The crown plug (10) is retained within the outer member (30) through the distortion of the outer member (30) inwardly which thereby grips and clamps the crown plug (10) within the bore. The securement arrangement comprises a clamping arrangement (50) by which an inward radial force is generated in order to distort (deflect/compress) an outer member (30) inwardly in order to grip a component located within the outer member (30). The outer member (30) is elastically deformed such that the outer member (30) will return to a released position once the clamping force is released/removed. In the preferred embodiment, two concentric oppositely arranged tapered surfaces are arranged to move axially over each other to create the inwardly directed force. The combination of the clamping (squeeze) securing force together with the solid body provides an improved crown plug arrangement which is also easy and reliable to operate.
E21B 23/02 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
E21B 33/035 - Well headsSetting-up thereof specially adapted for underwater installations
As shown in Figure 1, the present invention provides a pressure energised seal (10) for a wellhead (11) and, in particular, provides a seal (10) of an annulus between an inner wellhead casing member (14) and an outer wellhead casing member (16). The wellhead (11) incorporates a clamping arrangement (22) whereby the outer member (6) is arranged to be deflected radially inwardly in order to grip and secure the inner member (14) within the bore of the outer member (16). The present invention provides an improved seal for use in such a clamping arrangement (22). In particular, the seal (10) includes a sealing lip (12) which locates within a groove provided in the outer clamping surface (15) of the inner member (14). A seal is activated and created as the outer member (16) is clamped inwardly since this causes the outer member (16) to compress the inner member (14) and to reduce the diameter of the inner member (14). This squeezing of the inner member (14) causes the sealing lip (12) to come into contact with the outer member (16) and to be pressed against the outer member (16). This thereby automatically creates a seal as the inner member (14) is clamped by the outer member (16). The normal inherent sealing strength is increased due to the sealing lip (12) being urged to flare (20) outwardly as a result of the pressure within the annulus to be sealed.
The present invention provides a running tool 10 for a casing hanger 12 in which the casing hanger 12 is arranged to be clamped within a well bore. In the clamped position, the suspension weight of the casing hanger 12 (and suspended) casing string is supported by the wellhead and the running tool 10 is then releasable from the casing hanger 12. The release of the running tool 10 from the casing hanger 12 is performed by applying an axial pressure down the running tool 10 which then enables the securement means 30 of the running tool 10 to be moved into an unsecured position. In the secured position, the casing hanger 12 is suspendable from the running tool 10 and the running tool 10 supports the suspension weight of the casing hanger 12 (and the casing string located there below). The running tool 10 comprises activation means 40 in order to enable the securement means 30 to move from the secured position to the unsecured position. The running tool 10 includes release prevention means 50 in order to prevent the movement of the securement means 30 from the secured position to the unsecured position whilst the suspension weight of the casing hanger 12 is suspended from the running tool 10.
E21B 33/04 - Casing headsSuspending casings or tubings in well heads
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
-24- P6656.PC/NAJ 01 September 2014 ABSTRACT Running Tool The present invention provides a running tool 10 for a casing hanger 12 in which the casing hanger 12 is arranged to be clamped withina well bore. In the clamped position, the suspension weight of the casing hanger 12 (and suspended) casing string is supported by the wellhead and the running tool 10 is then releasable from the casing hanger 12.The release of the running tool 10 from the casing hanger 12 is performed by applying an axial pressure down the running tool 10 which then enables the securement means 30 of the running tool 10 to be moved into an unsecured position. In the secured position, the casing hanger 12 is suspendable from the running tool 10 and the running tool 10 supports the suspension weight of the casing hanger 12 (and the casing string located there below). The running tool 10 comprises activation means 40 in order to enable the securement means 30 to move from the secured position to the unsecured position. The running tool 10 includes release prevention means 50 in order to prevent the movement of the securement means 30 from the secured position to the unsecured position whilst the suspension weight of the casing hanger 12 is suspended from the running tool 10. [Figure 1]
E21B 33/04 - Casing headsSuspending casings or tubings in well heads
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
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, Christmas trees (for oil or natural gas
extraction), valves, risers, riser connectors, pipeline
connectors, jumper connectors, metal to metal seals, high
pressure seals, geothermal wellheads, subsea connectors,
wellhead connectors, subsea wellheads, tubing hangers,
casing hangers, seal assemblies, caps, crown plugs, casing
and tubing heads, adapters, adapter and spacer spools,
flange to connectors, threaded connectors, valve removal
plugs, mud line suspension systems, washout sleeves, pipes;
wellhead systems; adjustable wellhead systems; subsea
wellhead systems; surface wellhead systems; exploration
wellhead systems; tie-back connectors; high pressure/high
temperature tie-back connectors; metal goods for supporting
oil and gas field conduits; metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields; casing connectors in oil and gas wells; subsea
wellhead temporary abandonment caps; annulus monitoring and
lockdown systems for wellheads; suspension systems for oil
and gas wells; conversion wellheads for oil and gas wells;
tie back connectors; wellhead trees; wellhead dry trees;
wellhead wet trees; parts and fittings therefor. Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
machines and machine tools for use in completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, geothermal wellheads, subsea wellheads, wellhead
connectors in the nature of pipe fittings and flanges;
pipeline repair tools; running tools; parts and fittings
therefor. Construction, installation, maintenance, repair and rental
services relating to oil and gas well structures; rental of
wellhead systems and components used in wellhead systems for
oil and gas wells; rental of wellhead systems for jack-up
exploration drilling; construction, installation,
maintenance, repair and rental of goods for use in drilling
and completing oil and gas wells and in the production of
oil and gas from wells; construction, installation,
maintenance, repair and rental of wellheads, Christmas trees
for oil and gas wells, valves, risers, riser connectors,
pipeline connectors, pipeline repair tools, jumper
connectors, metal to metal seals, high pressure seals,
geothermal wellheads, subsea connectors, wellhead
connectors, subsea wellheads, tubing hangers, casing
hangers, seal assemblies, caps, crown plugs, casing and
tubing heads, adapters, adapter and spacer spools, flange to
connectors, threaded connectors, valve removal plugs,
running tools, mud line suspension systems, washout sleeves,
pipes, wellhead systems, subsea wellhead systems, surface
wellhead systems, exploration wellhead systems, adjustable
wellhead systems, tie-back connectors, high pressure/high
temperature tie-back connectors, metal goods for supporting
oil and gas field conduits, metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields, casing connectors in oil and gas wells, subsea
wellhead temporary abandonment caps, annulus monitoring and
lockdown systems for wellheads, suspension systems for oil
and gas wells, conversion wellheads for oil and gas wells,
tie back connectors, wellhead trees, wellhead dry trees,
wellhead wet trees; advisory, information and consultancy
services relating to the aforesaid services. Design services relating to oil and gas well structures;
engineering services; oil and gas engineering services;
research and development of wellhead systems; design of
wellhead systems; design and testing of wellhead and mudline
equipment; engineering project management services;
engineering project planning services; engineering design
and consultancy services; subsea and offshore engineering
services; technical inspection services; inspection of goods
for quality control; engineering, research, design and
inspection services for goods for use in drilling and
completing oil and gas wells and in the production of oil
and gas from wells; engineering, research, design and
inspection services for wellheads, Christmas trees for oil
and gas wells, valves, risers, riser connectors, pipeline
connectors, pipeline repair tools, jumper connectors, metal
to metal seals, high pressure seals, geothermal wellheads,
subsea connectors, wellhead connectors, subsea wellheads,
tubing hangers, casing hangers, seal assemblies, caps, crown
plugs, casing and tubing heads, adapters, adapter and spacer
spools, flange to connectors, threaded connectors, valve
removal plugs, running tools, mud line suspension systems,
washout sleeves, pipes, wellhead systems, subsea wellhead
systems, surface wellhead systems, exploration wellhead
systems, adjustable wellhead systems, tie-back connectors,
high pressure/high temperature tie-back connectors, metal
goods for supporting oil and gas field conduits, metal goods
for supporting conduits in jack-up exploration drilling in
oil and gas fields, casing connectors in oil and gas wells,
subsea wellhead temporary abandonment caps, annulus
monitoring and lockdown systems for wellheads, suspension
systems for oil and gas wells, conversion wellheads for oil
and gas wells, tie back connectors, wellhead trees, wellhead
dry trees, wellhead wet trees; feasibility studies;
engineering feasibility studies; testing services; advisory,
information and consultancy services relating to the
aforesaid services.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, Christmas trees (for oil or natural gas
extraction), valves, risers, riser connectors, pipeline
connectors, jumper connectors, metal to metal seals, high
pressure seals, geothermal wellheads, subsea connectors,
wellhead connectors, subsea wellheads, tubing hangers,
casing hangers, seal assemblies, caps, crown plugs, casing
and tubing heads, adapters, adapter and spacer spools,
flange to connectors, threaded connectors, valve removal
plugs, mud line suspension systems, washout sleeves, pipes;
wellhead systems; adjustable wellhead systems; subsea
wellhead systems; surface wellhead systems; exploration
wellhead systems; tie-back connectors; high pressure/high
temperature tie-back connectors; metal goods for supporting
oil and gas field conduits; metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields; casing connectors in oil and gas wells; subsea
wellhead temporary abandonment caps; annulus monitoring and
lockdown systems for wellheads; suspension systems for oil
and gas wells; conversion wellheads for oil and gas wells;
tie back connectors; wellhead trees; wellhead dry trees;
wellhead wet trees; parts and fittings therefor. Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
machines and machine tools for use in completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, geothermal wellheads, subsea wellheads, wellhead
connectors in the nature of pipe fittings and flanges;
pipeline repair tools; running tools; parts and fittings
therefor. Construction, installation, maintenance, repair and rental
services relating to oil and gas well structures; rental of
wellhead systems and components used in wellhead systems for
oil and gas wells; rental of wellhead systems for jack-up
exploration drilling; construction, installation,
maintenance, repair and rental of goods for use in drilling
and completing oil and gas wells and in the production of
oil and gas from wells; construction, installation,
maintenance, repair and rental of wellheads, Christmas trees
for oil and gas wells, valves, risers, riser connectors,
pipeline connectors, pipeline repair tools, jumper
connectors, metal to metal seals, high pressure seals,
geothermal wellheads, subsea connectors, wellhead
connectors, subsea wellheads, tubing hangers, casing
hangers, seal assemblies, caps, crown plugs, casing and
tubing heads, adapters, adapter and spacer spools, flange to
connectors, threaded connectors, valve removal plugs,
running tools, mud line suspension systems, washout sleeves,
pipes, wellhead systems, subsea wellhead systems, surface
wellhead systems, exploration wellhead systems, adjustable
wellhead systems, tie-back connectors, high pressure/high
temperature tie-back connectors, metal goods for supporting
oil and gas field conduits, metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields, casing connectors in oil and gas wells, subsea
wellhead temporary abandonment caps, annulus monitoring and
lockdown systems for wellheads, suspension systems for oil
and gas wells, conversion wellheads for oil and gas wells,
tie back connectors, wellhead trees, wellhead dry trees,
wellhead wet trees; advisory, information and consultancy
services relating to the aforesaid services. Design services relating to oil and gas well structures;
engineering services; oil and gas engineering services;
research and development of wellhead systems; design of
wellhead systems; design and testing of wellhead and mudline
equipment; engineering project management services;
engineering project planning services; engineering design
and consultancy services; subsea and offshore engineering
services; technical inspection services; inspection of goods
for quality control; engineering, research, design and
inspection services for goods for use in drilling and
completing oil and gas wells and in the production of oil
and gas from wells; engineering, research, design and
inspection services for wellheads, Christmas trees for oil
and gas wells, valves, risers, riser connectors, pipeline
connectors, pipeline repair tools, jumper connectors, metal
to metal seals, high pressure seals, geothermal wellheads,
subsea connectors, wellhead connectors, subsea wellheads,
tubing hangers, casing hangers, seal assemblies, caps, crown
plugs, casing and tubing heads, adapters, adapter and spacer
spools, flange toconnectors, threaded connectors, valve
removal plugs, running tools, mud line suspension systems,
washout sleeves, pipes, wellhead systems, subsea wellhead
systems, surface wellhead systems, exploration wellhead
systems, adjustable wellhead systems, tie-back connectors,
high pressure/high temperature tie-back connectors, metal
goods for supporting oil and gas field conduits, metal goods
for supporting conduits in jack-up exploration drilling in
oil and gas fields, casing connectors in oil and gas wells,
subsea wellhead temporary abandonment caps, annulus
monitoring and lockdown systems for wellheads, suspension
systems for oil and gas wells, conversion wellheads for oil
and gas wells, tie back connectors, wellhead trees, wellhead
dry trees, wellhead wet trees; feasibility studies;
engineering feasibility studies; testing services; advisory,
information and consultancy services relating to the
aforesaid services.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, Christmas trees (for oil or natural gas
extraction), valves, risers, riser connectors, pipeline
connectors, jumper connectors, metal to metal seals, high
pressure seals, geothermal wellheads, subsea connectors,
wellhead connectors, subsea wellheads, tubing hangers,
casing hangers, seal assemblies, caps, crown plugs, casing
and tubing heads, adapters, adapter and spacer spools,
flange to connectors, threaded connectors, valve removal
plugs, mud line suspension systems, washout sleeves, pipes;
wellhead systems; adjustable wellhead systems; subsea
wellhead systems; surface wellhead systems; exploration
wellhead systems; tie-back connectors; high pressure/high
temperature tie-back connectors; metal goods for supporting
oil and gas field conduits; metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields; casing connectors in oil and gas wells; subsea
wellhead temporary abandonment caps; annulus monitoring and
lockdown systems for wellheads; suspension systems for oil
and gas wells; conversion wellheads for oil and gas wells;
tie back connectors; wellhead trees; wellhead dry trees;
wellhead wet trees; parts and fittings therefor. Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
machines and machine tools for use in completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, geothermal wellheads, subsea wellheads, wellhead
connectors in the nature of pipe fittings and flanges;
pipeline repair tools; running tools; parts and fittings
therefor. Construction, installation, maintenance, repair and rental
services relating to oil and gas well structures; rental of
wellhead systems and components used in wellhead systems for
oil and gas wells; rental of wellhead systems for jack-up
exploration drilling; construction, installation,
maintenance, repair and rental of goods for use in drilling
and completing oil and gas wells and in the production of
oil and gas from wells; construction, installation,
maintenance, repair and rental of wellheads, Christmas trees
for oil and gas wells, valves, risers, riser connectors,
pipeline connectors, pipeline repair tools, jumper
connectors, metal to metal seals, high pressure seals,
geothermal wellheads, subsea connectors, wellhead
connectors, subsea wellheads, tubing hangers, casing
hangers, seal assemblies, caps, crown plugs, casing and
tubing heads, adapters, adapter and spacer spools, flange to
connectors, threaded connectors, valve removal plugs,
running tools, mud line suspension systems, washout sleeves,
pipes, wellhead systems, subsea wellhead systems, surface
wellhead systems, exploration wellhead systems, adjustable
wellhead systems, tie-back connectors, high pressure/high
temperature tie-back connectors, metal goods for supporting
oil and gas field conduits, metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields, casing connectors in oil and gas wells, subsea
wellhead temporary abandonment caps, annulus monitoring and
lockdown systems for wellheads, suspension systems for oil
and gas wells, conversion wellheads for oil and gas wells,
tie back connectors, wellhead trees, wellhead dry trees,
wellhead wet trees; advisory, information and consultancy
services relating to the aforesaid services. Design services relating to oil and gas well structures;
engineering services; oil and gas engineering services;
research and development of wellhead systems; design of
wellhead systems; design and testing of wellhead and mudline
equipment; engineering project management services;
engineering project planning services; engineering design
and consultancy services; subsea and offshore engineering
services; technical inspection services; inspection of goods
for quality control; engineering, research, design and
inspection services for goods for use in drilling and
completing oil and gas wells and in the production of oil
and gas from wells; engineering, research, design and
inspection services for wellheads, Christmas trees for oil
and gas wells, valves, risers, riser connectors, pipeline
connectors, pipeline repair tools, jumper connectors, metal
to metal seals, high pressure seals, geothermal wellheads,
subsea connectors, wellhead connectors, subsea wellheads,
tubing hangers, casing hangers, seal assemblies, caps, crown
plugs, casing and tubing heads, adapters, adapter and spacer
spools, flange to connectors, threaded connectors, valve
removal plugs, running tools, mud line suspension systems,
washout sleeves, pipes, wellhead systems, subsea wellhead
systems, surface wellhead systems, exploration wellhead
systems, adjustable wellhead systems, tie-back connectors,
high pressure/high temperature tie-back connectors, metal
goods for supporting oil and gas field conduits, metal goods
for supporting conduits in jack-up exploration drilling in
oil and gas fields, casing connectors in oil and gas wells,
subsea wellhead temporary abandonment caps, annulus
monitoring and lockdown systems for wellheads, suspension
systems for oil and gas wells, conversion wellheads for oil
and gas wells, tie back connectors, wellhead trees, wellhead
dry trees, wellhead wet trees; feasibility studies;
engineering feasibility studies; testing services; advisory,
information and consultancy services relating to the
aforesaid services.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, Christmas trees (for oil or natural gas
extraction), valves, risers, riser connectors, pipeline
connectors, jumper connectors, metal to metal seals, high
pressure seals, geothermal wellheads, subsea connectors,
wellhead connectors, subsea wellheads, tubing hangers,
casing hangers, seal assemblies, caps, crown plugs, casing
and tubing heads, adapters, adapter and spacer spools,
flange to connectors, threaded connectors, valve removal
plugs, mud line suspension systems, washout sleeves, pipes;
wellhead systems; adjustable wellhead systems; subsea
wellhead systems; surface wellhead systems; exploration
wellhead systems; tie-back connectors; high pressure/high
temperature tie-back connectors; metal goods for supporting
oil and gas field conduits; metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields; casing connectors in oil and gas wells; subsea
wellhead temporary abandonment caps; annulus monitoring and
lockdown systems for wellheads; suspension systems for oil
and gas wells; conversion wellheads for oil and gas wells;
tie back connectors; wellhead trees; wellhead dry trees;
wellhead wet trees; parts and fittings therefor. Metal goods for use in drilling and completing oil and gas
wells and in the production of oil and gas from wells;
machines and machine tools for use in completing oil and gas
wells and in the production of oil and gas from wells;
wellheads, geothermal wellheads, subsea wellheads, wellhead
connectors in the nature of pipe fittings and flanges;
pipeline repair tools; running tools; parts and fittings
therefor. Construction, installation, maintenance, repair and rental
services relating to oil and gas well structures; rental of
wellhead systems and components used in wellhead systems for
oil and gas wells; rental of wellhead systems for jack-up
exploration drilling; construction, installation,
maintenance, repair and rental of goods for use in drilling
and completing oil and gas wells and in the production of
oil and gas from wells; construction, installation,
maintenance, repair and rental of wellheads, Christmas trees
for oil and gas wells, valves, risers, riser connectors,
pipeline connectors, pipeline repair tools, jumper
connectors, metal to metal seals, high pressure seals,
geothermal wellheads, subsea connectors, wellhead
connectors, subsea wellheads, tubing hangers, casing
hangers, seal assemblies, caps, crown plugs, casing and
tubing heads, adapters, adapter and spacer spools, flange to
connectors, threaded connectors, valve removal plugs,
running tools, mud line suspension systems, washout sleeves,
pipes, wellhead systems, subsea wellhead systems, surface
wellhead systems, exploration wellhead systems, adjustable
wellhead systems, tie-back connectors, high pressure/high
temperature tie-back connectors, metal goods for supporting
oil and gas field conduits, metal goods for supporting
conduits in jack-up exploration drilling in oil and gas
fields, casing connectors in oil and gas wells, subsea
wellhead temporary abandonment caps, annulus monitoring and
lockdown systems for wellheads, suspension systems for oil
and gas wells, conversion wellheads for oil and gas wells,
tie back connectors, wellhead trees, wellhead dry trees,
wellhead wet trees; advisory, information and consultancy
services relating to the aforesaid services. Design services relating to oil and gas well structures;
engineering services; oil and gas engineering services;
research and development of wellhead systems; design of
wellhead systems; design and testing of wellhead and mudline
equipment; engineering project management services;
engineering project planning services; engineering design
and consultancy services; subsea and offshore engineering
services; technical inspection services; inspection of goods
for quality control; engineering, research, design and
inspection services for goods for use in drilling and
completing oil and gas wells and in the production of oil
and gas from wells; engineering, research, design and
inspection services for wellheads, Christmas trees for oil
and gas wells, valves, risers, riser connectors, pipeline
connectors, pipeline repair tools, jumper connectors, metal
to metal seals, high pressure seals, geothermal wellheads,
subsea connectors, wellhead connectors, subsea wellheads,
tubing hangers, casing hangers, seal assemblies, caps, crown
plugs, casing and tubing heads, adapters, adapter and spacer
spools, flange to connectors, threaded connectors, valve
removal plugs, running tools, mud line suspension systems,
washout sleeves, pipes, wellhead systems, subsea wellhead
systems, surface wellhead systems, exploration wellhead
systems, adjustable wellhead systems, tie-back connectors,
high pressure/high temperature tie-back connectors, metal
goods for supporting oil and gas field conduits, metal goods
for supporting conduits in jack-up exploration drilling in
oil and gas fields, casing connectors in oil and gas wells,
subsea wellhead temporary abandonment caps, annulus
monitoring and lockdown systems for wellheads, suspension
systems for oil and gas wells, conversion wellheads for oil
and gas wells, tie back connectors, wellhead trees, wellhead
dry trees, wellhead wet trees; feasibility studies;
engineering feasibility studies; testing services; advisory,
information and consultancy services relating to the
aforesaid services.
15.
Securement arrangement for securing casing inside a subsea wellhead
A wellhead securement arrangement releasably clamps casing strings such that they cannot move in an upwards or downwards longitudinal direction. Prior to being clamped, the securement arrangement secures the casing strings in a first position whereby cement returns are able to flow around the hangers towards the surface. Once cemented, the casing strings are released and moved upwardly, where the securement arrangement clamps the hangers into position, thus creating an axial load on the casing strings while also preventing movement in the upward and downward longitudinal directions.
The present invention provides monitoring means for monitoring the space and volume within a lower annulus. In particular, the monitoring means monitors the space and volume within the lower annulus 52 located between the inner surface of the 22 intermediate casing string 22 and the outer surface of the inner casing string 32. Furthermore, the monitoring means provides the capability to retrieve and/or introduce fluid(s) into the annular space 52. The monitoring means provides a port, specifically a passageway 100, which extends upwardly from the annular space 52 to an outlet located above the hanger 36 for the intermediate casing string 22. The passageway 100 is provided in a sleeve 102. The monitoring means includes a sensor located above the hanger 36 which means that the fluid in the annular space 52 can be monitored without the need for penetrating a casing in the wellhead.
E21B 33/14 - Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
E21B 29/12 - Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windowsDeforming of pipes in boreholes or wellsReconditioning of well casings while in the ground specially adapted for underwater installations
E21B 21/00 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
E21B 33/043 - Casing headsSuspending casings or tubings in well heads specially adapted for underwater well heads
A mudline connector including a compression adaptor which can be elastically deformed onto an internal tubular member. The compression adaptor deflects inwardly to grip upper and lower sealing mandrels, providing axial and bending load support and creating a seal to isolate bore pressure from an outer annulus. The clamping arrangement provides a sealed connection between two well casing sections extending in opposite axial directions. The well casings are gripped and held in an end to end configuration by a radial load applied internally by a compression ring. The connector is activated by introducing pressure to activate pistons which in turn provide an axial thrust to stroke the internally tapered compression ring along the externally tapered compression collar, effectively creating an interference fit therebetween. This deflects the inner surface of the compression collar inwardly, deflecting the compression adaptor inwardly to grip the outer surfaces of the upper and lower sealing mandrels.
The present invention provides a wellhead securement arrangement including a first inner casing string 32 which is held in axial loading and a second inner casing string 56 which is also held in axial loading. Both of the first and second inner casing strings 32, 56 are releasably clamped such that the casing strings 32, 56 cannot move in an upwards or a downwards longitudinal direction. Prior to being clamped in such a position, the wellhead securement arrangement provides first retaining means to retain the first and second casing strings in cementing position whereby "cement returns" are able to flow around the respective hangers 36, 58 and upward through a casing towards the surface. Once cemented, the upper hangers 36, 58 of the respective inner casing strings 32, 56 are moved upwardly where the hanger 36, 58 is then clamped in position to maintain the respective inner casing string 32, 56 under an axial load whilst being prevented from moving either upwardly or downwardly.
The present invention provides monitoring means for monitoring the space and volume within a lower annulus. In particular, the monitoring means monitors the space and volume within the lower annulus 52 located between the inner surface of the 22 intermediate casing string 22 and the outer surface of the inner casing string 32. Furthermore, the monitoring means provides the capability to retrieve and/or introduce fluid(s) into the annular space 52. The monitoring means provides a port, specifically a passageway 100, which extends upwardly from the annular space 52 to an outlet located above the hanger 36 for the intermediate casing string 22. The passageway 100 is provided in a sleeve 102. The monitoring means includes a sensor located above the hanger 36 which means that the fluid in the annular space 52 can be monitored without the need for penetrating a casing in the wellhead.
06 - Common metals and ores; objects made of metal
07 - Machines and machine tools
08 - Hand tools and implements
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Metal goods for use in drilling and completing oil and gas wells and in the production of oil and gas from wells, namely wellheads, Christmas trees, valves, risers, riser connectors, pipeline connectors, pipeline repair tools, jumper connectors, metal to metal seals, high pressure seals, geothermal wellheads, subsea connectors, wellhead connectors, subsea wellheads. (1) Construction, installation and maintenance services relating to oil and gas well structures; design services relating to oil and gas well structures.
The present invention provides a mudline connector (10) including a compression adaptor (40) which can be elastically deformed onto an internal tubular member.In the preferred embodiment the compression adaptor (40) deflects inwardly to grip an upper and a lower sealing mandrel (50, 56) in order to provide axial and bending load support and create a seal in order to isolate bore (160) pressure from an outer annulus (170) and vice-versa. The clamping arrangement (10) thereby provides a sealed connection between two well casing sections which extend in opposite axial directions. The well casings are gripped and held in an end to end configuration. The connector (10) does this by means of a radial load applied internally by a compression ring (60).The connector (10) is activated by introducing pressure into a piston port activation thus stroking an activation piston(s) (80) which in turn provides an axial thrust to stroke the internally tapered compression ring (60) along the externally tapered compression collar (70) effectively creating an interference fit therebetween. This deflects the inner surface of the compression collar (70) inwardly which thereby deflects the compression adaptor (40) inwardly in order to grip the outer surfaces of the upper and lower sealing mandrels (50, 56).
06 - Common metals and ores; objects made of metal
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Metal goods for use in drilling and completing oil and gas wells and in the production of oil and gas from wells, namely wellheads, christmas trees, valves, risers, riser connectors, pipeline connectors, pipeline repair tools, jumper connectors, metal to metal seals, high pressure seals, geothermal wellheads, subsea connectors, wellhead connectors; none of the above being cables and steel wire ropes. Construction, installation and maintenance services relating to oil and gas well structures. Design services relating to oil and gas well structures.
A method and apparatus for installing casing hangers in a wellbore utilizing an externally activated gripping system to temporarily bind wearbushings secured to casing and tubing hangers in order to lock-down such hangers during various wellbore drilling activities, thereby minimizing the size of landing shoulders and eliminating additional lock down equipment and simplifying running procedures.
06 - Common metals and ores; objects made of metal
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Metal goods for use in drilling and completing oil and gas wells and in the production of oil and gas from wells, namely wellheads, christmas trees, valves, risers, riser connectors, pipeline connectors, pipeline repair tools, jumper connectors, metal to metal seals, high pressure seals, geothermal wellheads, subsea connectors, wellhead connectors. (1) Construction, installation and maintenance services relating to oil and gas well structures.
(2) Design services relating to oil and gas well structures.
06 - Common metals and ores; objects made of metal
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Metal goods for use in drilling and completing oil and gas wells and in the production of oil and gas from wells, namely wellheads, Christmas trees, valves, risers, riser connectors, pipeline connectors, pipeline repair tools, jumper connectors, metal to metal seals, high pressure seals, geothermal wellheads, subsea connectors, wellhead connectors. (1) Construction, installation and maintenance services relating to oil and gas well structures.
(2) Design services relating to oil and gas well structures.
06 - Common metals and ores; objects made of metal
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Metal goods for use in drilling and completing oil and gas wells and in the production of oil and gas from wells, namely wellheads, Christmas trees, valves, risers, riser connectors, pipeline connectors, pipeline repair tools, jumper connectors, metal to metal seals, high pressure seals, geothermal wellheads, subsea connectors, wellhead connectors. (1) Construction, installation and maintenance services relating to oil and gas well structures.
(2) Design services relating to oil and gas well structures.
06 - Common metals and ores; objects made of metal
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Metal goods for use in drilling and completing oil and gas wells and in the production of oil and gas from wells, namely wellheads, Christmas trees, valves, risers, riser connectors, pipeline connectors, pipeline repair tools, jumper connectors, metal to metal seals, high pressure seals, geothermal wellheads, subsea connectors, wellhead connectors. Construction, installation and maintenance services relating to oil and gas well structures. Design services relating to oil and gas well structures.
06 - Common metals and ores; objects made of metal
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Metal goods for use in drilling and completing oil and gas wells and in the production of oil and gas from wells, namely wellheads, Christmas trees, valves, risers, riser connectors, pipeline connectors, pipeline repair tools, jumper connectors, metal to metal seals, high pressure seals, geothermal wellheads, subsea connectors, wellhead connectors. Construction, installation and maintenance services relating to oil and gas well structures. Design services relating to oil and gas well structures.
29.
METHOD OF CALCULATING WELLHEAD SYSTEM LOAD CAPACITY
The present invention provides a method of calculating the load capacity of a wellhead system. The method comprises determining a first contact stress at a first interface between an annular component and a collar and equating a radial deflection of an inner surface of the annular component with a radial deflection of an outer surface of the collar. The method uses a first contact stress and the axial movement of the annular component to determine a contact stress at a gripping interface between a gripping surface and an inner tubular member. The method also equates a radial deflection of the outer surface of the inner tubular member with (i) a radial deflection of the gripping surface plus (ii) a depth of penetration of a ridge of the outer surface of the inner tubular member into the gripping surface (iii) a radial dimension of an initial gap between the outer surface of the inner tubular member and the inner surface of the outer tubular member.
A clamp for clamping two concentric tubes, typically two concentric tubes in an oil or gas well. The clamp has two axially movable tapered components which can be pulled over one another in an axial direction to provide a contraction of internal diameter which grips the smaller diameter tube. In one embodiment, a spacer is fitted to allow the tapered components to be held apart until the tubes have been correctly positioned. The spacer is then removed, and the tapered components are drawn together to effect the clamping. A hydraulic ram can be provided to separate the tapered components should readjustment be required. In another embodiment, the larger diameter tube is made with a relatively thin wall, so that it can be distorted inwards to grip the smaller tube.
This invention relates to a method of determining a grip coefficient in a wellhead system. The method comprises: forming a test block having opposite side surfaces including a ridged profile, the test block being made from the same material as at least an outer surface of an inner tubular member of a wellhead system; gripping the test block between two gripping plates so as to form an interface between each of the side surfaces and a test face of a respective one of the gripping plates, the test face being made from the same material as at least an inner surface of an outer tubular member of a wellhead system; applying a gradually increasing load to the test block in a direction parallel to a plane of the interface; continuously monitoring relative movement between the test block and the gripping plate at the interfaces; determining the applied load at which slip between the test block and the gripping plates occurs; and determining the grip coefficient by calculating the ratio of the applied load to the gripping force at the time slip occurs.
-24- P6656.PC/NAJ 01 September 2014 ABSTRACT Running Tool The present invention provides a running tool 10 for a casing hanger 12 in which the casing hanger 12 is arranged to be clamped withina well bore. In the clamped position, the suspension weight of the casing hanger 12 (and suspended) casing string is supported by the wellhead and the running tool 10 is then releasable from the casing hanger 12.The release of the running tool 10 from the casing hanger 12 is performed by applying an axial pressure down the running tool 10 which then enables the securement means 30 of the running tool 10 to be moved into an unsecured position. In the secured position, the casing hanger 12 is suspendable from the running tool 10 and the running tool 10 supports the suspension weight of the casing hanger 12 (and the casing string located there below). The running tool 10 comprises activation means 40 in order to enable the securement means 30 to move from the secured position to the unsecured position. The running tool 10 includes release prevention means 50 in order to prevent the movement of the securement means 30 from the secured position to the unsecured position whilst the suspension weight of the casing hanger 12 is suspended from the running tool 10. [Figure 1]
The present invention provides monitoring means for monitoring the space and volume within a lower annulus. In particular, the monitoring means monitors the space and volume within the lower annulus 52 located between the inner surface of the 22 intermediate casing string 22 and the outer surface of the inner casing string 32. Furthermore, the monitoring means provides the capability to retrieve and/or introduce fluid(s) into the annular space 52. The monitoring means provides a port, specifically a passageway 100, which extends upwardly from the annular space 52 to an outlet located above the hanger 36 for the intermediate casing string 22. The passageway 100 is provided in a sleeve 102. The monitoring means includes a sensor located above the hanger 36 which means that the fluid in the annular space 52 can be monitored without the need for penetrating a casing in the wellhead.
The present invention provides a wellhead securement arrangement including a first inner casing string 32 which is held in axial loading and a second inner casing string 56 which is also held in axial loading. Both of the first and second inner casing strings 32, 56 are releasably clamped such that the casing strings 32, 56 cannot move in an upwards or a downwards longitudinal direction. Prior to being clamped in such a position, the wellhead securement arrangement provides first retaining means to retain the first and second casing strings in cementing position whereby "cement returns" are able to flow around the respective hangers 36, 58 and upward through a casing towards the surface. Once cemented, the upper hangers 36, 58 of the respective inner casing strings 32, 56 are moved upwardly where the hanger 36, 58 is then clamped in position to maintain the respective inner casing string 32, 56 under an axial load whilst being prevented from moving either upwardly or downwardly.
The present invention provides a mudline connector (10) including a compression adaptor (40) which can be elastically deformed onto an internal tubular member.In the preferred embodiment the compression adaptor (40) deflects inwardly to grip an upper and a lower sealing mandrel (50, 56) in order to provide axial and bending load support and create a seal in order to isolate bore (160) pressure from an outer annulus (170) and vice-versa. The clamping arrangement (10) thereby provides a sealed connection between two well casing sections which extend in opposite axial directions. The well casings are gripped and held in an end to end configuration. The connector (10) does this by means of a radial load applied internally by a compression ring (60).The connector (10) is activated by introducing pressure into a piston port activation thus stroking an activation piston(s) (80) which in turn provides an axial thrust to stroke the internally tapered compression ring (60) along the externally tapered compression collar (70) effectively creating an interference fit therebetween. This deflects the inner surface of the compression collar (70) inwardly which thereby deflects the compression adaptor (40) inwardly in order to grip the outer surfaces of the upper and lower sealing mandrels (50, 56).
The present invention relates to a crown plug (10) for a tree of/associated with an oil/gas well/wellhead and a securement arrangement (50) for securing the crown plug (10) within the tree. The main body (12) of the crown plug (10) comprises a solid body to create the barrier within the production bore. The solid body thereby creates a robust, strong and reliable barrier. The crown plug (10) is retained within the outer member (30) through the distortion of the outer member (30) inwardly which thereby grips and clamps the crown plug (10) within the bore. The securement arrangement comprises a clamping arrangement (50) by which an inward radial force is generated in order to distort (deflect/compress) an outer member (30) inwardly in order to grip a component located within the outer member (30). The outer member (30) is elastically deformed such that the outer member (30) will return to a released position once the clamping force is released/removed. In the preferred embodiment, two concentric oppositely arranged tapered surfaces are arranged to move axially over each other to create the inwardly directed force. The combination of the clamping (squeeze) securing force together with the solid body provides an improved crown plug arrangement which is also easy and reliable to operate.
E21B 23/02 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing
E21B 23/06 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
E21B 33/035 - Well headsSetting-up thereof specially adapted for underwater installations
As shown in Figure 1, the present invention provides a pressure energised seal (10) for a wellhead (11) and, in particular, provides a seal (10) of an annulus between an inner wellhead casing member (14) and an outer wellhead casing member (16). The wellhead (11) incorporates a clamping arrangement (22) whereby the outer member (6) is arranged to be deflected radially inwardly in order to grip and secure the inner member (14) within the bore of the outer member (16). The present invention provides an improved seal for use in such a clamping arrangement (22). In particular, the seal (10) includes a sealing lip (12) which locates within a groove provided in the outer clamping surface (15) of the inner member (14). A seal is activated and created as the outer member (16) is clamped inwardly since this causes the outer member (16) to compress the inner member (14) and to reduce the diameter of the inner member (14). This squeezing of the inner member (14) causes the sealing lip (12) to come into contact with the outer member (16) and to be pressed against the outer member (16). This thereby automatically creates a seal as the inner member (14) is clamped by the outer member (16). The normal inherent sealing strength is increased due to the sealing lip (12) being urged to flare (20) outwardly as a result of the pressure within the annulus to be sealed.
A method and apparatus for a seal assembly for a unitized wellhead system for land or platform applications utilizes a friction grip technology to create maintainable metal-to-metal seals with finely-controlled contact stresses, lock-down casing and tubing hangers, support test loads to minimize the site of landing shoulders required, and to rotationally lock casing hangers to provide simplified running procedures. The system can be used in combination with a friction grip clamping assembly to greatly streamline the wellhead design.
A method and apparatus for installing casing hangers in a wellbore utilizing an externally activated gripping system to temporarily bind wearbushings secured to casing and tubing hangers in order to lock-down such hangers during various wellbore drilling activities, thereby minimizing the size of landing shoulders and eliminating additional lock down equipment and simplifying running procedures.
