Offshore platform

Details Offshore platform Offshore platform

1977-01-11

1981-12-15

Shapiro, Jacob

Hydraulic and earth engineering

Marine structure or fabrication thereof

Floatable to site and supported by marine floor

114 77R, 285286, E02D 2100, B63B 3540

Patent

active

RE0308234

ABSTRACT:
A method for joining two or more jacket or substructure components of an offshore platform in the water to form a single jacket unit. An offshore platform is located in deep water by dividing a jacket or support of extensive length therefor into at least two sections which have only sufficient buoyancy to float at water surface when the sections are launched from at least a vessel at a selected location. The sections are aligned and connected together. Guide means ensure proper alignment of the legs of the sections. Access tubes from the surface of the water to the hollow legs permit direct internal welding in securing the legs of the sections together. The sections are then sunk at the selected location until the jacket is in an upright position at which point it is anchored by driving piling through the jacket's hollow legs into the sea floor, following which the deck of the platform is placed or stabbed on the anchored jacket.

REFERENCES:
patent: 2422168 (1947-06-01), Kirby
patent: 2857744 (1958-10-01), Swiger et al.
patent: 3186180 (1965-06-01), Swanlund, Jr. et al.
patent: 3407771 (1968-10-01), Takezawa et al.
patent: 3641774 (1972-02-01), Hekkanen

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