Buoys – rafts – and aquatic devices – Buoy – For mooring a vessel
Patent
1993-04-15
1994-03-08
Swinehart, Edwin L.
Buoys, rafts, and aquatic devices
Buoy
For mooring a vessel
114230, B63B 2202
Patent
active
052922715
ABSTRACT:
An improved detachable mooring system (1) is disclosed of the kind including a rotatable turret (10) mounted on the vessel (5) and a buoyant spider buoy (20), secured by chains (22) to the sea floor, which may be selectively connected by means of a hydraulic connector (209) to the bottom of the turret (10). The improvement relates to manufacturing the turret in three sections (10A, 10B, 10C), with top and bottom sections joined ultimately by a middle section. The top section (10C) includes a machined surface (102) for connection of the bearing retainer ring to the upper roller bearing (598). The bottom section (10A) includes a machined cylindrical journal surface (110) for connection to the radial support bearing. Another improvement relates to testing during manufacture of the mating and connection between the top of the spider buoy (20) and the bottom of the turret (10) prior to deployment of the vessel and spider buoy (20) in the sea. Such testing occurs before the bottom section (10A) of the turret is installed on the vessel (5) and joined to the turret middle (10B) and upper sections (10C).
REFERENCES:
patent: 3407768 (1968-10-01), Graham
patent: 3525312 (1970-08-01), Beck et al.
patent: 4321720 (1982-03-01), Havre
patent: 4490121 (1984-12-01), Coppens et al.
patent: 4604961 (1984-06-01), Ortloff
patent: 4650431 (1987-03-01), Kentosh
patent: 4892495 (1990-01-01), Svenson
patent: 4955310 (1990-09-01), Pollack
O'Nion, et al, Innovative Disconnectable Mooring System for Floating Production System of HZ-21-1 Oil Field at Huiyhon, South China Sea, May 7-10, 1990; presented at the 22nd Annual Offshore Technology Conference; OTC published paper 6251.
Offshore Engineer-pp. 30-31 entitled SMB Goes Underwater for Earlier Reconnection.
Boatman L. Terry
Etheridge Charles O.
Sofec, Inc.
Swinehart Edwin L.
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