Hydraulic and earth engineering – Marine structure or fabrication thereof – With work deck vertically adjustable relative to floor
Patent
1983-02-07
1984-05-29
Taylor, Dennis L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With work deck vertically adjustable relative to floor
405203, 405217, E21B 1502, E02B 1702
Patent
active
044511744
ABSTRACT:
A mobile offshore platform has a buoyant and ballastable mat base of substantial horizontal extent. A cylindrical pylon is fixed to and extends upwardly from the center of the base. The pylon has a height greater than the maximum operating water depth of the platform. A positively buoyant deck unit has a central opening through it within which the pylon cooperates. The deck unit is movable vertically along the pylon in response to the operation of jacking mechanisms and cooperating jacking legs located adjacent the corners of the deck unit. The jacking legs are engageable at their lower ends with the base whereby operation of the jacking mechanism causes the deck unit to be moved vertically along the pylon relative to the base. In use, the deck unit is elevated to the top of the pylon after the base is submerged into contact with a sea floor and the jacking legs are thereafter disposed in a retracted position with their lower ends adjacent the deck unit. In use, the deck unit is disposed above the water surface. The platform is especially suited for use in ice-covered waters on the margins of the Arctic Ocean.
REFERENCES:
patent: 2841961 (1958-07-01), Lucas
patent: 3433024 (1969-03-01), Diamond et al.
patent: 3717001 (1973-02-01), Tam
patent: 3754403 (1973-08-01), Mott et al.
patent: 3996754 (1976-12-01), Lowery
patent: 4065934 (1978-01-01), Dysarz
patent: 4265568 (1981-05-01), Herrmann et al.
Global Marine Inc.
Taylor Dennis L.
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