摘要:
A buoy for use in loading or unloading of a flowable medium, especially oil, comprising an outer buoyancy member (2) arranged to be introduced and secured in a submerged downwardly open receiving space in a floating vessel, and a central member (3) which is rotatably mounted in the outer member and is intended for anchoring to the sea bed and arranged for passage of medium between a transfer line (57) which, in operation, is coupled to the lower end of the central member (3) and a tube system on the vessel. The central member (3) is provided with a lower extension body (8) having an outer peripheral portion (9) abutting on and essentially corresponding to the outer periphery of the adjacent end (10) of the outer buoyancy member (2), and having a lower portion (11) which is downwardly tapering from the outer peripheral portion (9). A number of fastening means (12) for fastening of the upper ends of anchoring lines (13) for anchoring of the buoy (1) are fastened at intervals along the periphery of the outer peripheral portion (9) of the extension body (8), and the extension body (8) comprises at least one buoyancy chamber (56) for buoyancy or ballast material.
摘要:
An arrangement in a vessel for loading or unloading at sea a flowable medium, especially oil. The vessel is provided with a receiving space for a submarine buoy in the form of a module built on the bow portion of the vessel. The submerged downwardly opening receiving space is connected by a service shaft with the deck of the vessel. The receiving space has a downwardly opening conical shape for mating with a buoy of corresponding outer shape.
摘要:
A system for transferring a flowable medium, especially oil, to or from a floating vessel, comprising a buoyancy unit in the form of a submerged buoy which is anchored to the sea bed by catenary mooring lines keeping the buoy submerged at a desired depth when it is not in use, at least one transfer line which is connected to the buoy, for the transfer of medium, a downwardly open receiving device arranged on the vessel below the water surface and arranged for receipt and connection of the buoy, a hoisting device provided on the vessel for raising of the buoy for introduction thereof into the receiving space, and a device enabling the vessel to turn about a vertical axis through the buoy when this is connected in the receiving space.
摘要:
A buoy for use in loading or unloading a flowable medium, especially oil from a vessel at sea. The buoy includes an outer buoyancy member having a conical shape, and a central member, rotatably mounted in the outer member which forms a passage for the flowable medium from the lower end of the buoy which is connected to a transfer line to a delivery system within the vessel. The outer member is received and locked in a conical shaped opening in the bottom of the vessel which is connected to a receiving space which extends up to the deck of the vessel. The outer member forms a seal with the lower end of the opening to seal the sea off from the receiving space. The central member, has a relatively small mass and a small inertia, such that the outer buoyancy member together with the vessel may readily turn thereabout.
摘要:
A buoy for use in loading or unloading a flowable medium, especially oil from a vessel at sea. The buoy includes an outer member and a central member rotatably mounted in the outer member. The central member forms a passage for the flowable medium from the lower end of the buoy which is connected to a transfer line to a tube system within the vessel. The outer member is received and latched in an opening in the bottom of the vessel. The central member is connected to the tube system by a swivel means coupled to the upper end of the central member by a flexible joint which allows angular displacement about the axis of connection.
摘要:
An arrangement in a loading/unloading buoy for use in shallow waters, wherein the buoy (1) is arranged for introduction and releasable securement in a downwardly open receiving space in a floating vessel, the buoy comprising a bottom-anchored center member (2) for the passage of medium from or to a transfer line (25) which is coupled to the underside of the center member (2), and an outer member (4) which is rotatably mounted on the center member to allow turning of the vessel about the center member when the outer member is secured in the receiving space. The buoy is provided with a bottom support structure (15) which is connected to the center member (2) of the buoy and arranged for support of the buoy at the sea bed (16) when it is not in use, and to the center member of the buoy there are connected a number of mooring lines (21) extending outwards from the buoy (1) a substantial distance along the sea bed (16) and having an inherent elasticity allowing raising of the buoy from the sea bed.
摘要:
A method and a vessel for offshore oil loading, wherein the vessel comprises a number of center tanks (3) arranged in the longitudinal direction of the vessel, and a number of wing tanks (5, 6) located in pairs on either side of respective center tanks, a loading line (19) being connected to the center tanks (3) via respective valves (20), and adjacent center tanks (3) being connected to each other via bulkhead valves (18). The method comprises the steps of a) firstly effecting filling of a desired number of the center tanks (3), these being substantially narrower and having a correspondingly smaller volume than the wing tanks (5, 6), b) thereafter opening bulkhead valves (17) between a center tank (3) and an appurtenant wing tank pair (5, 6), and sluicing out oil from the center tanks (3) into the two wing tanks (5, 6) by means of the static pressure from the center tanks, the bulkhead valves (18) between the center tanks (3) being open, so that the wing tank pair (5, 6) is filled as quickly as possible by suitable operation of the bulkhead valves (18) between the center tanks (3) and of the valves (20) of the loading line (19) to the center tanks (3), c) closing the bulkhead valves (17) of the two wing tanks (5, 6) when these and the appurtenant center tank (3) are filled to a desired level, and d) repeating the filling process according to the steps b) and c) successively for additional wing tank pairs (5, 6) after that all center tanks (3) have been filled again.
摘要:
A device for guiding a loading/unloading buoy during pulling-up into a receiving space in the bottom of a vessel. The device includes a guide cylinder which is vertically moveable in a shaft in the vessel. The guide cylinder is extend into the receiving space such that guide elements on the guide cylinder provide side stabilization of the buoy as it is brought into the receiving space.
摘要:
A method and a system for connecting a submerged loading/unloading buoy to a submerged receiving space in a floating vessel for transfer of oil to or from the vessel. The buoy is anchored to the sea bed and is connected to a transfer line for carrying the oil. A sink line, having an auxiliary buoy attached to its end, is lowered from the vessel through the receiving space, with the auxiliary buoy coming to the water surface. A suitably marked pick-up line connected to the loading/unloading buoy, is taken up and connected to the sink line. The vessel is then positioned above the submerged loading/unloading buoy and the sink and pick-up lines are pulled up through the receiving space, so that the loading/unloading buoy is hoisted up and moved to a locking position in the receiving space. The vessel is provided with a hoist to lift the lines and the loading/unloading buoy, and also with a service shaft connecting the receiving space to the deck of the vessel.
摘要:
A locking and release mechanism for securing a loading/unloading buoy to a vessel. The buoy is of a type to be introduced into a submerged downwardly open receiving space in the vessel and to be fastened in a releasable manner in the receiving space. The locking and release mechanism includes hydraulically actuated locking elements mounted about horizontal axes at the sides of the receiving space to pivot between the locking and releasing positions. The buoy has a peripheral collar with downwardly facing abutment edge for engagement with the locking elements in the locking position thereof.