Method and apparatus for supporting a drilling platform on the o

Details Method and apparatus for supporting a drilling platform on the o Method and apparatus for supporting a drilling platform on the o

1974-04-08

1976-12-14

Shapiro, Jacob

Wells

Receptacles

With separate air chamber having openable passage

61 50, 166 5, 175 9, E02B 1700, E21B 712

Patent

active

039967565

ABSTRACT:
A method and apparatus for positioning and supporting a drilling platform on the ocean floor in which the drilling platform is a monopod structure with a broad flat base. The ocean floor is dredged to form a large level area depressed below the mudline. A precast drilling cellar having a flat bottom wall and upstanding side walls extending around the perimeter of the bottom wall is lowered to the leveled area. Hydraulic jets in the bottom of the cellar displace material from beneath the cellar, allowing the cellar to sink into the ocean floor to the depth of the sidewalls. The platform is centered over the cellar with the base resting on the top of the sidewalls.

REFERENCES:
patent: 2382768 (1945-08-01), Zweers
patent: 3247672 (1966-04-01), Johnson
patent: 3703207 (1972-11-01), Horton
patent: 3712068 (1973-01-01), Liautaud
patent: 3763656 (1973-10-01), Van Daalen et al.
patent: 3768268 (1973-10-01), Laffont et al.
patent: 3769803 (1973-11-01), Finney

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