Offshore jackup hull-to-legs load transfer device and elevating

Details Offshore jackup hull-to-legs load transfer device and elevating Offshore jackup hull-to-legs load transfer device and elevating

1999-03-24

2000-06-20

Lillis, Eileen Dunn

Hydraulic and earth engineering

Marine structure or fabrication thereof

With work deck vertically adjustable relative to floor

254112, F02B 1708

Patent

active

060769963

ABSTRACT:
An arrangement of a jackup platform's elevating system, leg guides, hull-to-legs load transfer device, and method of operation of the load transfer device for an offshore jackup platform's hull to be supported by legs which have one or more vertical toothed gear racks attached. An apparatus consisting of rectangular blocks with protruding lugs that are shaped for efficient engagement with a portion of the upper faces of the gear rack teeth, that extend vertically on the leg chords of the jackup platform. The rectangular blocks are movable in a direction perpendicular to one side of the gear rack. Powered guide assemblies control movement of the rectangular blocks such that their protruding lugs can move into the spaces in between the gear rack teeth. The protruding lugs of the rectangular blocks can then bear against the gear rack teeth and faces of the rectangular blocks can bear against structure of the hull to transfer hull weight and storm induced interaction forces between the hull and the legs of the jackup platform.

REFERENCES:
patent: 85598 (1869-01-01), Lewis
patent: 5906457 (1999-05-01), Choate et al.

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