Offshore jackup rig locking apparatus and method

Details Offshore jackup rig locking apparatus and method Offshore jackup rig locking apparatus and method

1991-05-02

1992-08-18

Corbin, David H.

Hydraulic and earth engineering

Marine structure or fabrication thereof

With work deck vertically adjustable relative to floor

E02B 1706

Patent

active

051393662

ABSTRACT:
A locking apparatus and method for an offshore jackup rig having at least one leg extending through the hull and at least one set of rack teeth attached to each of the legs. One or more locking bars are supported from the hull and are movable in a direction substantially normal to the face of the rack teeth. A piston and cylinder power assembly moves the bars towards the teeth and a retention system engages the bars holding them in engagement with the teeth. The elevating system of the rig coacts with the set bars to lock the hull and legs together.

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patent: 4255069 (1981-05-01), Yielding
patent: 4389140 (1983-06-01), Bordes
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patent: 4479401 (1984-10-01), Korkut
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patent: 4538938 (1986-09-01), Grzelka et al.
patent: 4589799 (1986-05-01), Hotta et al.
patent: 4662787 (1987-05-01), Tatsuguchi
patent: 4813814 (1989-03-01), Shibuta et al.

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