Abstract:
A floating, offshore vessel having surface-piercing columns (e.g., a semi- submersible or a tension leg platform) has means for storage of liquid hydrocarbon liquids inside one or more columns. There are typically four columns on a semi-submersible. Hydrocarbon liquids may be stored in only two of the four columns, thereby providing a safe-zone where the living quarters are located. A column houses at least one hydrocarbon storage (cargo) tank and at least one variable ballast tank, where the weight capacity of the hydrocarbon cargo tank(s) is approximately equal to the weight capacity of the variable ballast tank(s). The hydrocarbon cargo tank(s) and the variable ballast tank(s) are positioned in such an orientation that the horizontal center of gravity of the cargo tank(s) is (nearly) identical to horizontal center of gravity of the variable ballast tank(s). Both the hydrocarbon cargo tank and the variable ballast tank may be directly accessible from top-of-column.
Abstract:
The present invention relates to an installation (10) for facilitating the loading of minerals into a marine vessel (80). The installation comprises an onshore slurrying facility (20) for fluidising the minerals into a slurry; an offshore separation facility (40) for removing at least some of the fluid from the slurry; a pipeline (23) fluidly connecting the slurrying facility to the separation facility; and a pump for conveying the slurry from the slurrying facility to the separation facility along the pipeline. The minerals are available for offshore loading from the installation onto the vessel.
Abstract:
A method and apparatus for transporting or storing compressed natural gas in a marine environment includes the providing of a heavy lift vessel that has a weather deck area that is bounded by forward and aft, port and starboard sides or walls that extend above the weather deck. A buoyant module is provided that contains a pipeline, the pipeline including multiple bends and multiple layers. The pipeline is supported at differing elevations within the module interior so that the various sections of the pipeline are preferably spaced apart to enable visual and/or remote exterior inspection (e.g. video, radar, x-ray, acoustic, or other exterior, non-destructive test) of the outer surface of the pipeline. The pipeline has a continuous bore that is piggable for internal inspections. The module can be transferred to a heavy lift vessel or can be used as flotation. The combination of heavy lift vessel and module can travel to a selected location for loading and unloading compressed natural gas. The module can be placed in a marine environment to serve as a storage facility for compressed natural gas.
Abstract:
In certain offshore locations, for example off the West Coast of Africa, FPSO facilities provide an offloading facility to receive and load produced crude oil onto shuttle tankers. In such arrangements FPSO facilities use spread moored tankers with flowlines suspended in the water column to an offloading buoy or buoys which are located 1,000 to 1,500 meters away from the FPSO. Typically steel pipe flowlines as used with intermediate floatation to provide a suitable configuration that will avoid detrimental loads being imposed resulting from relative motions of the FPSO and the offloading buoy. According to the invention, a Suspended Pipe Line End Manifold (SPLEM) (20) is connected to the end of the flowline assembly for support during towout. The SPLEM (20) is positioned near the buoy (10) and then connected at the sea surface to the bottom of the buoy by flexible leads (14) such as anchor chains. The SPLEM (20) is then flooded by selectively flooding compartments to cause it to sink to an operational position below the buoy. Next, additional submarine hoses (22) or flexible pipe are connected to complete the flowline to the buoy.
Abstract:
Floating storing unit for liquid cargo, such as oil, condensate etc. The storing unit should during normal operations, be unmanned, and is moored in a free, rotatable way relative to a cargo transferring construction mounted close to the bow of the unit. The unit comprises an elongated hull having narrow centre tanks stretching in the longitudinal direction of the unit and side tanks extending on each side of the centre tanks, and being self-draining toward the centre tank. The centre tank is drained toward cargo transferring pumps in the forward and/or aftward end of each centre tank. At the stern of the unit loading/unloading equipment is mounted. The centre and side tanks are filled with gas and liquid so that the volatile liquids in a small extent liberate gases into the atmosphere.
Abstract:
A cold water piping system including a floating platform (50) having horizontal and vertical surfaces, the platform including a moon pool generally in the middle of the horizontal surface in the form of a vertical cylinder with four recesses (62) having a rectangular shape, an articulating interface (51) suspended directly from the platform, the interface including a tubular shape made of fabric and a bellows assembly disposed at a bottom portion thereof. The system also includes at least two suspension cable assemblies secured to the platform, where the at least two suspension cables cross the moon pool (58), vertically mounted modular elements (53), where ends of the suspension cable assemblies are fastened to a top modular element at four diametrically opposed points, and a strainer (54) having sea water intakes including a counterweight (64) connected to the lowest modular element. The system also includes winches (56) disposed on the horizontal surface of the platform and deployment cables (57) connected to the strainer and winches.
Abstract:
The invention relates to a hydrocarbon transfer system comprising a first structure (8) carrying an articulated arm (4,5,61,62). The system has at a free end (64) a first connector part (13,43,65), and a vessel (7) comprising a second connector part (47,48,70), wherein each connector part comprises a housing (72,73) with at least two fluid ducts (66,67,68,69) within said housing. The ducts can be placed into sealing engagement along respective sealing faces (94,95), and a locking member (74,75,78,79,101) for locking the housings (72,73) of the connector parts together, wherein the fluid ducts (68,69) in either the first or second connector are connected to a respective fluid swivel (91,92,93) or flexible duct section to allow at least partial rotation of the ducts along their longitudinal axis, and are connected to a drive means (90) for jointly rotating the ducts along a centreline of the connector parts for alignment of the ducts in the first and second connector parts, the fluid ducts in the first or second connector part comprising a section (98) which is displaceable in the longitudinal direction, by a displacement member (97) for varying the axial position of the sealing faces (94,95) of the movable duct section relative to the housing.
Abstract:
The invention relates to a fluid transfer system, in particular for LNG in which an articulated vertical and horizontal mooring arm are suspended from a support on the processing vessel. Independently moveable ducts, for instance cryogenic hard piping are placed parallel to the mooring arms such that a transfer system is obtained in which is the mooring forces are insulated from the fluid transfer line with which rapid connection and disconnection is possible and which provides a large yaw resistance. In a preferred embodiment, the mooring system comprises two vertical arms connected to a triangular horizontal yoke attached to the bow of the LNG-carrier for improved yaw resistance.
Abstract:
The invention relates to a hydrocarbon transfer system comprising a first structure (8) carrying an articulated arm (4,5,61,62). The system has at a free end (64) a first connector part (13,43,65), and a vessel (7) comprising a second connector part (47,48,70), wherein each connector part comprises a housing (72,73) with at least two fluid ducts (66,67,68,69) within said housing. The ducts can be placed into sealing engagement along respective sealing faces (94,95), and a locking member (74,75,78,79,101) for locking the housings (72,73) of the connector parts together, wherein the fluid ducts (68,69) in either the first or second connector are connected to a respective fluid swivel (91,92,93) or flexible duct section to allow at least partial rotation of the ducts along their longitudinal axis, and are connected to a drive means (90) for jointly rotating the ducts along a centreline of the connector parts for alignment of the ducts in the first and second connector parts, the fluid ducts in the first or second connector part comprising a section (98) which is displaceable in the longitudinal direction, by a displacement member (97) for varying the axial position of the sealing faces (94,95) of the movable duct section relative to the housing.
Abstract:
A method and apparatus for offshore production of oil. Special shuttle tankers (50) with high-pressure cargo tanks (82) capable of containing the produced live crude oil at a pressure close to that of the ambient pressure inside a subterranean oil field, and without any processing of the live crude oil prior to transportation are used. The produced live crude oil from the subterranean oil field is pumped directly into the high-pressure cargo tanks (82) aboard the shuttle tanker (50). Lighter fractions of the live crude oil stored in the shuttle tanker (50) may be used as a fuel to power the propulsion machinery (95) and the auxiliary machinery aboard the shuttle tanker. The pressures in the tanks (82) are ordinary above 70 kPa. The tanker vessel (50) transports the produced live crude oil to an onshore processing plant for separation into gas, water, solids, and stabilized crude oil.