Method and apparatus for mooring a vessel to a submerged element

Details Method and apparatus for mooring a vessel to a submerged element Method and apparatus for mooring a vessel to a submerged element

1994-05-24

1995-09-05

Avila, Stephen P.

Ships

Mooring device

Boom type

B63B 2100

Patent

active

054471141

ABSTRACT:
A mooring system for a vessel including a mooring area on a bottom surface thereof, includes a mooring element coupled to the sea floor by a plurality of mooring tethers which resides, when not in use, in a storage position a preselected depth below the surface. An upper surface of the mooring element includes a sealing surface surrounding a target area to be coupled within the mooring area. The system includes apparatus for raising the mooring element from the storage position into a mooring position in which the sealing surface is in contact with the bottom surface of the vessel so that mooring area is sealed between the bottom surface of the vessel and the target area and a pump for lowering the pressure between the bottom surface of the vessel and the target area of the upper surface of the mooring element to a first level for immobilizing the mooring element with respect to the bottom surface of the vessel and a second level so that the mooring element is maintained in sliding contact with the bottom surface of the vessel. The system also includes a device for detecting a displacement of the mooring element from a desired position of the mooring element within the mooring area.

REFERENCES:
patent: 3588796 (1971-06-01), Armistead
patent: 4604961 (1986-08-01), Ortloff et al.
patent: 4723501 (1988-02-01), Hovden et al.
patent: 4799825 (1989-01-01), Meyerhoff et al.
patent: 5041029 (1991-08-01), Kulpa
Innovative Disconnectible Mooring System for Floating Production System of HZ-21-1 Oil Field at Huizhou, South China Sea Copyright 1990, Offshore Technology Conference, paper presented at the 22nd OTC in Houston, Tex., May 7-10, 1990.

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