Turret for mooring VLCC size vessels

Details Turret for mooring VLCC size vessels Turret for mooring VLCC size vessels

1984-01-03

1986-07-22

Blix, Trygve M.

Ships

Mooring device

Boom type

441 3, B63B 2100

Patent

active

046012524

ABSTRACT:
A turret journaled in a vessel used in an offshore location wherein the mooring system is carried by the turret and the vessel is free to weathervane over a subsea wellhead or the like. Illustrated is a VLCC size ship-shape vessel of approximately 300,000 ton displacement for waterdepths of up to 6,000 feet, but latter is no limit. The turret uses segmented bearings under liquid pressure to obtain low friction and allows the vessel to rotate with turret under static and dynamic, and symmetrical and asymmetric loads (e.g., may exceed 30,000,000 pounds). The turret provides a carousel about the moonpool (e.g., 120 feet in diameter) for carrying compartments with winches, utility and storage functions, and topside skids for drilling rigs or other heavy machinery.

REFERENCES:
patent: 3602175 (1971-08-01), Morgan et al.
patent: 3735435 (1973-05-01), Mikulicic et al.
patent: 3739736 (1973-06-01), Carreau et al.
patent: 3774562 (1973-11-01), Dean
patent: 3886887 (1975-06-01), Cunningham et al.
patent: 4281613 (1981-08-01), Ray et al.
patent: 4305341 (1981-12-01), Stafford
Mechanical Engineering Design, 4th Edition, Shigley et al, McGraw-Hill, pp. 503, 516, 517.

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