Monopod jackup drilling system

Details Monopod jackup drilling system Monopod jackup drilling system

E - Fixed Constructions

02

B

61/12

E02B 17/02 (2006.01)

Patent

CA 1201296

Abstract A mobile offshore platform has a buoyant and bal- lastable 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 mechanisms 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.

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