| 摘要 |
<p>A system for use in offshore oil and gas production from production wells on the seabed, comprising a submerged buoy (1) having an outer buoyancy member (30) which is arranged for introduction and releasable fastening in a submerged, downwardly open receiving space (9) in a vessel (8), and a central member (31) rotatably mounted in the outer member and which is anchored to the seabed and connected to at least one transfer line (33) extending from a respective production well up to the buoy (1), a shaft (10) extending between the receiving space (9) and the deck (11) of the vessel. The system comprises a swivel unit (17) which is arranged to be lowered to or hoisted up from a service position at the lower end of the shaft (10), and to be connected in the service position to a tube system (64, 65) on the vessel (8), the swivel unit (17) comprising inner and outer mutually rotatable swivel members. At the upper end of the buoy (1) there is arranged a coupling unit (35) wherein the number of transfer lines (33, 34) in question are terminated, and which is arranged for connection to respectively release from a corresponding coupling unit (60) at the underside of the swivel unit (17).</p> |
