Hydraulic and earth engineering – Marine structure or fabrication thereof – With work deck vertically adjustable relative to floor
Patent
1997-07-09
1999-01-05
Graysay, Tamara L.
Hydraulic and earth engineering
Marine structure or fabrication thereof
With work deck vertically adjustable relative to floor
405209, 114265, E02B 1700, E02D 2500
Patent
active
058554556
ABSTRACT:
A submersible/semi-submersible dry lift carrier for transporting a jack-up drilling rig in a body of water includes a hull, a deck, at least one stability column, and a plurality of ballast compartments capable of being flooded and emptied for lowering and raising the carrier. The carrier further includes at least three leg wells, each well sized and spaced for receiving a leg from a jack-up drilling rig, and each of said wells comprising a vertical passageway having a first end opening through the deck and a second end opening through the bottom of the hull. The carrier further includes at least three pinning receptacles, each receptacle sized and spaced for receiving a spud can and leg from a jack-up drilling rig. In operation, the dry lift carrier is partially submerged by flooding the ballast compartments and then positioned beneath the floating jack-up rig. The carrier is de-ballasted thereby lifting the jack-up rig from a floating "wet" mode to a "dry" mode on the deck of the carrier. Alternatively, the dry lift carrier is submerged and rests on the floor of the body of water. The floating jack-up rig is positioned over the dry lift carrier. The carrier is de-ballasted thereby lifting the jack-up rig on the deck of the carrier.
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Baucke Thomas C.
Williford Frank B.
Ensco International, Inc.
Graysay Tamara L.
Lee Jong-Suk
Rippamonti Russell N.
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