Hydraulic and earth engineering – Marine structure or fabrication thereof – With work deck vertically adjustable relative to floor
Patent
1979-07-31
1982-05-11
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With work deck vertically adjustable relative to floor
114264, 114293, 254105, 405203, 405205, 405199, E02B 1704
Patent
active
043290884
ABSTRACT:
Method and apparatus for elevating a prefabricated, offshore, well-drilling or other platform on a prefabricated upright support in deep water. The platform is elevated by jacking units on a platform having legs suspended from a superstructure on the support. The upright support is stabilized against wind and wave action by four guy lines anchored at one end to the sea bottom and connected at its opposite end to the drum of winches mounted on two of the caissons. There are two drums in each of the two caissons. Each drum is connected to one guy line and is separately driven by a remotely controlled, reversible hydraulic motor. The motors are operated to maintain the support vertical and the fottings equally loaded; otherwise, uneven penetration of the footings into the sea bed would result. The guy lines are always tensioned against marine and wind forces.
The platform is buoyant and has four open caisson wells arranged in the same geometric pattern as the caissons of the support. The platform is towed to the drilling site and positioned in alignment with the support. Berthing of the platform relative to the support is accomplished by four lines anchored at one end to the sea bottom; two fore and two aft, and connected to winches mounted fore and aft on the platform; and by four cables, one cable being connected with each caisson and to a winch mounted on the platform. The winch connected to the cables are operable to berth the platform in the support.
REFERENCES:
patent: 2699321 (1955-01-01), Nelson
patent: 2932486 (1960-04-01), Suderow
patent: 2944403 (1960-07-01), Smith
patent: 2987892 (1961-06-01), Reeve
patent: 3031997 (1962-05-01), Nesbitt
patent: 3032105 (1962-05-01), Reistle
patent: 3857247 (1974-12-01), Phares
patent: 3876181 (1975-04-01), Lucas
patent: 3975841 (1976-08-01), Steenken et al.
patent: 4041711 (1977-08-01), Lucas
Glemser Harry W. F.
Marine Engineering Company, C.A.
Taylor Dennis L.
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