Rotating multi-path fluid manifold

Details Rotating multi-path fluid manifold Rotating multi-path fluid manifold

1984-12-24

1987-01-27

Basinger, Sherman D.

Buoys, rafts, and aquatic devices

Buoy

For mooring a vessel

141387, B63B 2152

Patent

active

046392289

ABSTRACT:
A method and apparatus for maintaining fluid flow between a fixed subsea wellhead riser conduit and a weathervaning floating production, storage and off-loading (FPSO) vessel without swivel or sliding seals. The fixed riser conduit is divided into two flowpaths which terminate in connectors. First and second drums, coaxially mounted for rotation about a vertical axis, have connectors which are connectable with the flowpath connectors. The drum connectors are connected to one end of flexible pipes, at least partially wound around a respective drum, with the other end tensioned and connected fixably to the FPSO vessel. Enough flexible pipe is on each drum to permit the drum to rotate about a connection arc of greater than 180.degree. when its respective connector connects one flowpath with the FPSO vessel. The connectors and drums are disposed such that each connection arc overlaps the other arc at both ends of each arc. Fluid flow is maintained through one flowpath until the weathervaning vessel approaches the end of the connection arc. After the overlap region is reached flow is established through the other drum and flowpath connector. When the end of the first flowpath connector arc is reached, the connector is disconnected while fluid flow is maintained in the second flowpath. Should further weathervaning continue such that the first flowpath connection arc is again reached, reconnection of the first drum and flowpath occurs.

REFERENCES:
patent: 3430670 (1969-03-01), Hopkins
patent: 3735435 (1973-05-01), Mikulicic et al.
patent: 3742536 (1973-07-01), Sada et al.
patent: 3911688 (1975-10-01), Behar et al.
patent: 4173804 (1979-11-01), Duc
patent: 4270611 (1981-06-01), Arnaudeau et al.
patent: 4273066 (1981-06-01), Anderson
patent: 4436048 (1984-03-01), Gentry et al.
"Transfer System Uses No Swivels", Offshore, May 1985, (p. 204).

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