A cryogenic fluid offloading system, having a tanker vessel (2) moored in line with an offshore mooring construction (4, 8) and connected to a processing unit, such as regasification plant (13). The degasification plant (13) has no large storage facilities, the tanker (2) being unloaded in dependen
A cryogenic fluid offloading system, having a tanker vessel (2) moored in line with an offshore mooring construction (4, 8) and connected to a processing unit, such as regasification plant (13). The degasification plant (13) has no large storage facilities, the tanker (2) being unloaded in dependence on onshore demand for gas.
대표청구항▼
The invention claimed is: 1. Cryogenic fluid offloading system comprising: an offshore mooring structure (4,5, 34, 35, 51,50, 61,62, 72,73, 80), connected to the seabed, a connecting member (10,26, 105, 105') that is attached to the mooring structure with a first end ( 23,115, 115') to be displacea
The invention claimed is: 1. Cryogenic fluid offloading system comprising: an offshore mooring structure (4,5, 34, 35, 51,50, 61,62, 72,73, 80), connected to the seabed, a connecting member (10,26, 105, 105') that is attached to the mooring structure with a first end ( 23,115, 115') to be displaceable around a vertical axis (9,39, 59,69, 79,89, 99, 117, 159), a tanker vessel (2) for loading cryogenic fluid at a first location, transporting it and off loading the cryogenic fluid at a second location, the tanker vessel being connected to the mooring structure via the connecting member, a first fluid duct (16) connected to the mooring structure, for supplying fluid away from the mooring structure, a second fluid duct (14,131, 136, 139, 150,152), connected to the mooring structure, for transporting fluid coming from the tanker vessel (2), to the mooring structure, a processing unit (13) for receiving a cryogenic fluid in liquid phase from the tanker vessel (2) and for supplying a gaseous phase of the fluid to the first fluid duct (16), and fluid supply means (31) for controlling supply of cryogenic fluid from the tanker vessel (12) to the processing unit (13), characterised in that the connecting member (10, 26, 105,105') is connected with a second end (22, 113) to the tanker vessel (2), the vertical axis (9, 39, 59,69, 79,89, 99,117, 159) being at least substantially in line with the tanker vessel (2) to allow displacement of the tanker vessel around the vertical axis, control means (30,36, 37) being provided for opening and closing of the fluid supply means (31) on the basis of a predetermined supply of the gaseous phase through the first fluid duct (16). 2. Cryogenic fluid offloading system according to claim 1, wherein the connecting member comprises an arm (10), the arm having a longitudinal section (20) with one end connected to a side of the tanker vessel (2) and extending in the length direction along the vessel towards the mooring structure (4, 5, 34,35, 51,50, 61, 62, 72, 73,80), and a transverse section (21) between the longitudinal section (20) and the mooring structure, substantially transverse to the length direction of the vessel. 3. Cryogenic fluid offloading system according to claim 2, wherein the length of the longitudinal section (20) of the arm ( 10) is at least ⅓ of the length of the tanker vessel (2) . 4. Cryogenic fluid offloading system according to claim 2, the second fluid duct (14) being supported by the arm (10), the arm (10) being attached to the tanker vessel (2) at or near midship of the tanker vessel. 5. Cryogenic fluid offloading system according to claim 2, the longitudinal section (20) of the arm extending alongside the vessel and being connected to a floating structure (12,32) moored alongside the tanker vessel. 6. Cryogenic fluid offloading system according to claim 5, wherein the length of the floating structure is not more than ⅔ of the length of the tanker vessel. 7. Cryogenic fluid offloading system according to claim 5, wherein the processing unit (13) is placed on the floating structure (12,32). 8. Cryogenic fluid offloading system according to claim 5, wherein the length of the floating structure is not more than half of the length of the tanker vessel. 9. Cryogenic fluid offloading system according to claim 2, wherein the length of the longitudinal section (20) of the arm ( 10) is at least 쩍 of the length of the tanker vessel (2). 10. Cryogenic fluid offloading system according to claim 1, the mooring structure comprising a buoy (4,5, 61, 62, 72,73), having a first part (5,61, 73) attached to the sea bed and a second part (4,62, 72, rotatably connected to the first part around the vertical axis, the second part being attached to the connecting member (10). 11. Cryogenic fluid offloading system according to claim 1, wherein the processing unit is placed on a floating element (34, 51, 61,62, 72,73), the connecting member (10) being with a first end (23) connected to the floating element (34,51, 61,62, 72,73). 12. Cryogenic fluid offloading system according to claim 11, the mooring structure comprising a tower (35,50) resting on the seabed(6), the tower being provided with at least one weight (41,42, 55) suspended from the tower such that it can be deflected away from a vertical equilibrium position, the floating element (34,51) being connected to the weight (41, 42, 55) via a respective deflection member (44,45 ,54). 13. Cryogenic fluid offloading system according to claim 11, the mooring structure comprising a tower (54) connected to the seabed, a top end of the tower being located below water level, the floating element (51) being attached with at least two cables ( 54) to the tower, the cables being provided with a restoring weight (55), wherein the floating element has a vertical shaft (52) between an upper and a lower part, a flexible fluid duct (53) extending from the processing unit (13) to the tower (54) via the shaft and being attached to the first fluid duct. 14. Cryogenic fluid offloading system according to claim 11, the floating element having an inner member (61) that is moored to the sea bed and that supports the processing unit (13), and an outer member (62) which can rotate around the inner member, connected to the connecting member (10). 15. Cryogenic fluid offloading system according to claim 11, the floating element having a buoyancy body (72) and a lower connector (73) that is moored to the sea bed (6) and that is rotatably connected to the buoyancy body (72). 16. Cryogenic fluid offloading system according to claim 11, a flexible fluid duct (53,66) extending from the floating element from at or near sea level to a predetermined depth below water level. 17. Cryogenic fluid offloading system according to claim 1, the mooring structure comprising a tower (35) connected to the seabed, the processing unit (13) being placed on the tower, the connecting member (10) being attached to the tower in an articulation joint (91,92) that can rotate around the vertical axis (99) and pivot around a substantially transverse axis. 18. Cryogenic fluid offloading system according to claim 1, the first fluid duct (16) being attached to the second fluid duct (14) via a first arm (82) attached to the mooring structure (35) and a second arm (83), substantially vertically supported by the first arm, the connections of the first arm to the mooring structure, of the first arm (82) to the second arm and of the second arm (83) to the second fluid duct (14), comprising at least six swivels. 19. Cryogenic offloading system according to claim 1, the mooring structure comprising a tower (35) resting on the seabed (6), the tower being provided with at least one suspension element (104,104'), carrying a substantially horizontal arm ( 105,105'), and being connected to a restoring weight ( 106), the processing unit(13) being placed on the tower( 35). 20. Cryogenic fluid offloading system according to claim 1, wherein the processing unit (13) comprises no LNG storage tanks that are larger than the volume of the LNG storage tanks of the tanker. 21. Cryogenic fluid offloading system according to claim 1, wherein the processing unit (13) comprises no LNG storage tanks that are larger than the 쩍 of volume of the LNG storage tanks of the tanker. 22. Cryogenic fluid offloading system according to claim 1, wherein the processing unit (13) comprises no LNG storage tanks that are larger than ⅓ of the volume of the LNG storage tanks of the tanker. 23. Cryogenic of f loading system comprising: an offshore mooring structure (4,5, 34, 35, 51,50, 61,62, 72,73, 80), connected to the seabed, a connecting member (10,105,105') that is attached to the mooring structure with a first end (23, 115, 115') to be displaceable around a vertical axis (9, 39, 59,69, 79,89, 99,117, 159), a tanker vessel (2) for loading cryogenic fluid at a first location, transporting it and offloading the cryogenic fluid at a second location, the tanker vessel being connected to the mooring structure via the connecting member, a first fluid duct (16) connected to the mooring structure, for supplying fluid away from the mooring structure, a second fluid duct (14,131, 136, 139, 150,152), connected to the mooring structure, for transporting fluid coming from the tanker vessel (2), to the mooring structure, a processing unit (13) for receiving a cryogenic fluid in liquid phase from the tanker vessel (2) and for supplying a gaseous phase of the fluid to the first fluid duct (16), and fluid supply means (31) for controlling supply of cryogenic fluid from the tanker vessel (12) to the processing unit (13), characterised in that the processing unit (13) is spaced at a distance of at least several tens of meters, the mooring structure being connected via an LNG duct (150,152) to the processing unit. 24. Cryogenic offloading system according to claim 23, the processing unit being placed on one of a tower (35) and a buoy ( 151). 25. Cryogenic offloading system according to claim 23, wherein, the processing unit (13) is spaced at a distance of at least several hundreds of meters from the mooring structure, the mooring structure being connected via an LNG duct (150,152) to the processing unit. 26. Cryogenic offloading system according to claim 23, wherein, the processing unit (13) is spaced at a distance of at least several kilometers from the mooring structure, the mooring structure being connected via an LNG duct (150,152) to the processing unit.
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이 특허에 인용된 특허 (4)
Flory John F. (Morris Township NJ), Articulated loading arm with end hoses for single point mooring.
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