Method of installing the deck of an offshore platform on a suppo

Details Method of installing the deck of an offshore platform on a suppo Method of installing the deck of an offshore platform on a suppo

1994-10-27

1996-06-04

Taylor, Dennis L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Floatable to site and supported by marine floor

4051951, 405204, E02B 1700

Patent

active

055226809

ABSTRACT:
In this method of putting an offshore platform deck into place on a support structure by means of a ballastable barge and of a plurality of cylinder and plunger piston assemblies, it is possible to avoid shocks between the pistons and the support structure, and also between the legs of the deck and the support structure, which shocks are due to vertical movements of the deck driven by the swell during the operations of putting the deck into place. This is done by providing in each leg: a low pressure hydraulic fluid accumulator; first controllable means for establishing high flow rate bidirectional communication between the accumulator and a chamber of a cylinder of the cylinder and plunger piston assembly, above the plunger piston; second controllable means for establishing high flow rate unidirectional communication from the accumulator to the chamber; and third controllable means for establishing low flow rate communication between the chamber and a hydraulic fluid reservoir.

REFERENCES:
patent: 2907172 (1959-10-01), Crake
patent: 4436454 (1984-03-01), Ninet et al.
patent: 4662788 (1987-05-01), Kypke et al.
patent: 4848967 (1989-07-01), Weyler
patent: 4930938 (1990-06-01), Rawstron et al.
patent: 5026226 (1991-06-01), Hollowell et al.
patent: 5219451 (1993-06-01), Datta et al.
G. J. White et al., "Offshore Installation of an Integrated Deck Onto a Preinstalled Jacket", OCT 5 260, 18th Annual Offshore Technology Conference in Houston, TX., May 5-8, 1986.

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