Hydraulic and earth engineering – Marine structure or fabrication thereof – With work deck vertically adjustable relative to floor
Patent
1977-10-28
1979-07-17
Shapiro, Jacob
Hydraulic and earth engineering
Marine structure or fabrication thereof
With work deck vertically adjustable relative to floor
405201, 405204, E02B 1704
Patent
active
041613767
ABSTRACT:
Disclosed is an improved fixed offshore platform and method of erecting the same. The platform has an open truss structure with upper and lower deck levels. The upper deck has removable floor sections to allow installation of equipment down through the truss structure. The platform is provided with pads for mounting equipment and housing in modules on the deck. No flotation is provided in the platform and means are provided for supporting the platform on the deck of a simple barge. The platform is generally triangular in shape having three caisson legs with one leg enlarged to allow drilling therethrough. Jacks are provided for gripping the legs and a crane is mounted on the deck to move along tracks provided thereon. In erecting the platform, the platform is first barged to the location of installation on a simple barge with the legs in a vertically-extending position and the platform in its normal operating position with the crane thereon. The barge is moored in position over a well site. At high tide, the legs are dropped and locked in position. As the tide subsides, the barge is floated from under the platform leaving the platform supported by the legs and the jacks. Next, the platform is jacked up to the desired height of use. Pilings are driven through the legs by use of the deck mounted crane. The legs are then grouted in place and welded to the platform. The jacks are removed from the legs and the equipment modules are installed. Drilling can then be accomplished through the enlarged leg.
REFERENCES:
patent: 202415 (1878-04-01), Cumming
patent: 2592448 (1952-04-01), McMenimen
patent: 3044269 (1962-07-01), Le Tourneau
patent: 3486343 (1969-12-01), Gibson et al.
patent: 3498477 (1970-03-01), Sommer
patent: 4018057 (1977-04-01), Erzen et al.
patent: 4065934 (1978-01-01), Dysarz
Ocean Industry of Feb. 1976, pp. 156-158.
Pool Company
Shapiro Jacob
LandOfFree
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