A wave energy conversion (WEC) device comprises a pair of hulls connected for mutual rotation about a pivot axis extending in a transverse direction of the WEC device. Each hull supports a an arcuate track, a body configured to move along the track and an energy converter configured to convert movement of the body relative to the track into electrical energy. The arcuate track extends in a plane defined by longitudinal and vertical axes of the WEC device such that the transverse pivot axis is substantially normal to said plane. The body is configured to move along the track in response to pitching of the respective hull and surging or heaving of the WEC device due to wave action.
F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
B63B 1/14 - Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected resiliently
A flow modification device connectable to a generally cylindrical element adapted for immersion in a fluid medium is provided. The device comprises an elongate body having a length and a generally circular cross-section; a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions having a height between 2% and 10% of a diameter of the body; and an aperture extending through the length of the elongate body, the aperture being adapted to receive the generally cylindrical element such that the flow modification device is arranged about the cylindrical element. The plurality of raised body portions are helically arranged or twisted about a longitudinal axis of the elongate body and are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the device is connected to the cylindrical element and the connected device and cylindrical element are immersed in the fluid medium and there is relative movement between the connected device and cylindrical element and the fluid medium.
F15D 1/12 - Influencing the flow of fluids around bodies of solid material by influencing the boundary layer
F16L 1/12 - Laying or reclaiming pipes on or under water
F16F 15/023 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using fluid means
F16F 7/14 - Vibration-dampersShock-absorbers of cable-support type, i.e. frictionally-engaged loop-forming cables
F16K 47/00 - Means in valves for absorbing fluid energy
3.
SENSOR MODULE FOR A MARINE BUOYANCY UNIT AND A SYSTEM AND METHOD FOR USING THE SAME
A sensor module for a marine buoyancy unit is disclosed, the marine buoyancy unit configured to be releasably connected to a marine riser. The sensor module comprises a housing releasably connectable at least partially within the marine buoyancy unit, a sensor disposed within the housing and configured to measure a parameter associated with the riser, in particular a dynamic condition parameter, which can be logged and communicated to a base station.
E21B 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelinesProtecting measuring instruments in boreholes against heat, shock, pressure or the like
B63B 21/50 - Anchoring arrangements for special vessels, e.g. for floating drilling platforms or dredgers
A flow modification device connectable to a generally cylindrical element adapted for immersion in a fluid medium, the device comprising an elongate body having a length and a generally circular cross-section; a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions being arranged generally parallel to a longitudinal axis of the body and having a height between 2% and 10% of a diameter of the body; and an aperture extending through the length of the elongate body, the aperture being adapted to receive the generally cylindrical element such that the flow modification device is arranged about the cylindrical element. The plurality of raised body portions are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the device is connected to the cylindrical element and the connected device and cylindrical element are immersed in the fluid medium and there is relative movement between the connected device and cylindrical element and the fluid medium.
A generally cylindrical element adapted for immersion in a fluid medium, the cylindrical element comprising an elongate body having a length and a generally circular cross-section, and a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions being arranged generally parallel to a longitudinal axis of the body and having a height between 2% and 10% of a diameter of the body. The plurality of raised body portions are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the cylindrical element is immersed in the fluid medium and there is relative movement between the cylindrical element and the fluid medium.
A wave energy converter is disclosed, comprising: a body configured to float in water and roll and/or pitch in response to wave action; a pendulum supported by the body and configured to swing in response to rolling and/or pitching of the body; an energy converting means associated with the pendulum and configured to convert swinging of the pendulum relative to the body into electrical energy; a pendulum adjusting means configured to adjust a swinging period of the pendulum, wherein the pendulum adjusting means includes one or more flywheels, each of the one or more flywheels being selectively operably connectable to the pendulum; a body tuning means configured to adjustably tune rolling characteristics of the body; and a controller configured to control the body tuning means such that a rolling period of the body approximates or matches a wave energy peak period.
F03B 13/20 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member and another member wherein both members are movable relative to the sea bed or shore
F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy
7.
A FLOW MODIFICATION DEVICE HAVING HELICAL STRAKES AND A SYSTEM AND METHOD FOR MODIFYING FLOW
A flow modification device connectable to a generally cylindrical element adapted for immersion in a fluid medium is provided. The device comprises an elongate body having a length and a generally circular cross-section; a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions having a height between 2% and 10% of a diameter of the body; and an aperture extending through the length of the elongate body, the aperture being adapted to receive the generally cylindrical element such that the flow modification device is arranged about the cylindrical element. The plurality of raised body portions are helically arranged or twisted about a longitudinal axis of the elongate body and are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the device is connected to the cylindrical element and the connected device and cylindrical element are immersed in the fluid medium and there is relative movement between the connected device and cylindrical element and the fluid medium.
A flow modification device connectable to a generally cylindrical element adapted for immersion in a fluid medium, the device comprising an elongate body having a length and a generally circular cross-section; a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions being arranged generally parallel to a longitudinal axis of the body and having a height between 2% and 10% of a diameter of the body; and an aperture extending through the length of the elongate body, the aperture being adapted to receive the generally cylindrical element such that the flow modification device is arranged about the cylindrical element. The plurality of raised body portions are adapted to reduce vortex- induced vibration and/or drag on the cylindrical element when the device is connected to the cylindrical element and the connected device and cylindrical element are immersed in the fluid medium and there is relative movement between the connected device and cylindrical element and the fluid medium.
E21B 15/02 - Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
B63B 21/50 - Anchoring arrangements for special vessels, e.g. for floating drilling platforms or dredgers
F16D 1/06 - Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
F15D 1/12 - Influencing the flow of fluids around bodies of solid material by influencing the boundary layer
F16L 55/04 - Devices damping pulsations or vibrations in fluids
9.
A CYLINDRICAL ELEMENT ADAPTED TO REDUCE VORTEX-INDUCED VIBRATION AND/OR DRAG
A generally cylindrical element adapted for immersion in a fluid medium, the cylindrical element comprising an elongate body having a length and a generally circular cross-section, and a plurality of raised body portions disposed about and extending along the length of the elongate body, the raised body portions being arranged generally parallel to a longitudinal axis of the body and having a height between 2% and 10% of a diameter of the body. The plurality of raised body portions are adapted to reduce vortex-induced vibration and/or drag on the cylindrical element when the cylindrical element is immersed in the fluid medium and there is relative movement between the cylindrical element and the fluid medium.
A riser module (10) including an outer tubular (30) internally carrying two or more internal tubulars (20). The module (10) further includes a decouplable coupling and sealing arrangement at each end of the module wherein an end of the outer tubular (30a) is couplable to the other end of a like outer tubular (30b) of an adjacent module (10b) for serial connection of a plurality of modules to form a riser, and each of the two or more internal tubulars (20a) is able to cooperate with like internal tubulars (20b) of adjacent modules to define a respective sealed flow path through the coupled modules (10). In the preferred form the outer tubular (30) constitutes a load bearing structure and the coupling and sealing arrangement of each module (10a) is configured to permit axial movement between each of the two or more internal tubulars (20a) and respective cooperating internal tubulars (20b) in an adjacent module (10b).
patents
