| 摘要 |
A system for offshore production of hydrocarbons by means of a vessel arranged for quick connection to and disconnection from a submerged buoy which comprises an outer buoyancy member for introduction and releasable securing in a submerged downwardly open receiving space in the vessel, and a centre member which is rotatably mounted in the outer member and is anchored to the sea bed and is connected to at least one riser extending between a production well and the vessel, a swivel device being arranged at the upper end of the buoy for interconnection and transfer of process fluid between the risers and a tube system on the vessel. The swivel device (9) comprises an outer member in the form of a female member (10) which is permanently fastened to the centre member of the buoy with its opening coaxial with the centre member, and an inner member in the form of a male member (11) which may be lowered into and raised from the female member (10) by means of an operating means (17) on the vessel. In connected condition the swivel members (10, 11) in a known manner define common annular spaces (23-25) communicating with associated fluid paths (26-31) in the swivel members (10, 11), and on each side of the annular spaces there ate provided sealing means (34, 35) which can be activated to form a seal between theannular spaces during operation, and which can be relieved when mutually disconnecting the swivel members.
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