Combination offshore drilling rig

Details Combination offshore drilling rig Combination offshore drilling rig

1985-05-30

1986-07-29

Taylor, Donald L.

Hydraulic and earth engineering

Marine structure or fabrication thereof

Floatable to site and supported by marine floor

405196, 175 7, E02B 1700, B63B 3500

Patent

active

046028943

ABSTRACT:
A combination offshore drilling rig which combines the desirable features of a slot-type drilling rig and a cantilever-type drilling rig while eliminating the limitations and undesirable features associated with either type of such rigs. The combination offshore drilling rig mounts the derrick and drilling equipment on a movable cantilever structure which may be positioned over a slot of sufficient area to permit the drilling operation to be carried out through the slot or may be moved outboard of the peripheral boundary of the rig hull to perform a drilling or workover operation outside the peripheral boundary of the rig hull.

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