Buoys – rafts – and aquatic devices – Buoy – For mooring a vessel
Patent
1999-06-10
2000-05-09
Basinger, Sherman
Buoys, rafts, and aquatic devices
Buoy
For mooring a vessel
11423012, B63B 2202
Patent
active
060596201
ABSTRACT:
An improved arrangement for connection of a disconnectable spider buoy to an internal turret of a floating production storage and off loading vessel is disclosed. Risers from subsea wells are connected by quick disconnect/connection devices to pipes which run through the turret and then via a product swivel to lines leading to storage tanks on the vessel. A structure is provided to create an enclosed space to enclose the connection devices at the top of the spider buoy. A ventilation shaft runs from the enclosed volume to atmosphere via the top of the turret. A forced air line is provided into the enclosed space for ventilating the space via the ventilation shaft during normal operations. If a gas leak is sensed in the enclosed space, the forced air line is closed. The small volume which surrounds the connection devices quickly fills with hydrocarbon gas to produce a high gas/air ratio in the enclosed space which greatly reduces danger of explosion.
REFERENCES:
patent: 4604961 (1986-08-01), Ortloff et al.
patent: 4765378 (1988-08-01), Engelskirchen et al.
patent: 5339760 (1994-08-01), Korsgaard
patent: 5564957 (1996-10-01), Breivik et al.
patent: 5823131 (1998-10-01), Boatman et al.
Basinger Sherman
Bush Gary L.
FMC Corporation
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