Disconnectable turret mooring system with a rotatable turn table
First Claim
1. Vessel (14) comprising a hull (3), a shaft (2) extending from an upper part (40) of the hull to a bottom (41) of the hull, a turret (1) being rotatably supported in the shaft via a turret bearing (4,5), a manifold support structure (31) carrying one or more conduits being rotatably supported on the turret via a manifold bearing (32), the turret comprising (1) a cavity (42) for receiving a mooring buoy (11) carrying one or more risers (12) and one or more vertically displaceable actuation members (33) near the manifold bearing (32) for vertically displacing the manifold support structure (31) relative to the turret (1) between a rotational position in which the manifold support structure (31) can rotate relative to the turret via the manifold bearing (32) and a locked position in which the bearing support structure (31) is rotationally locked relative to the turret.
1 Assignment
0 Petitions
Accused Products
Abstract
A vessel includes a hull, a shaft extending from an upper part of the hull to a bottom of the hull, a turret being rotatably supported in the shaft via a turret bearing, a manifold support structure carrying one or more conduits being rotatably supported on the turret via a manifold bearing. The turret includes a cavity for receiving a mooring buoy carrying one or more risers and one or more vertically displaceable actuation members near the manifold bearing for vertically displacing the manifold support structure relative to the turret between a rotational position in which the manifold support structure can rotate relative to the turret via the manifold bearing and a locked position in which the bearing support structure is rotationally locked relative to the turret.
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Citations
18 Claims
- 1. Vessel (14) comprising a hull (3), a shaft (2) extending from an upper part (40) of the hull to a bottom (41) of the hull, a turret (1) being rotatably supported in the shaft via a turret bearing (4,5), a manifold support structure (31) carrying one or more conduits being rotatably supported on the turret via a manifold bearing (32), the turret comprising (1) a cavity (42) for receiving a mooring buoy (11) carrying one or more risers (12) and one or more vertically displaceable actuation members (33) near the manifold bearing (32) for vertically displacing the manifold support structure (31) relative to the turret (1) between a rotational position in which the manifold support structure (31) can rotate relative to the turret via the manifold bearing (32) and a locked position in which the bearing support structure (31) is rotationally locked relative to the turret.
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14. Method of attaching a mooring buoy (11) comprising a number of risers (12) to a cavity (42) provided in a rotatable turret (1) near a bottom (41) of a hull (3) of a vessel (14), which turret is rotatably connected to the vessel via a turret bearing (4), the method comprising the steps of:
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lifting a mooring buoy (11) towards the cavity by hauling in a line (17) that is attached to the mooring buoy (11) via a lifting device (20,45), the line extending through the turret to the lifting device, establishing a disconnectable mechanical connection between the mooring buoy (11) and the cavity (42) to connect the mooring buoy (11) to the cavity (42), providing a manifold (7) on a rotatable manifold turntable (31), which manifold turntable is supported on the turret in a non-rotating manner on a support surface, and comprises a manifold bearing (32), lifting the manifold turntable (31) in an axial direction to be free from the support surface and engaging the manifold bearing (32) with a bearing support surface on the turret, rotating a manifold support structure (31) to be aligned with the turret, de-activating the manifold bearing (32) and lowering the manifold turntable (31) onto the support surface, and establishing a fluid connection between riser ends (55,56) on the mooring buoy and the manifold (53,54) so that the mooring buoy (11) is attached to the vessel.
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Specification