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Drilling Rigs - Semi-Submersible

A Semi-submersible platform or rig, is a mobile structure used for drilling for oil and natural gas in offshore environments. Their superstructures are supported by columns sitting on hulls or pontoons which are ballasted below the water surface. They provide excellent stability in rough, deep seas. Semi-submersible rigs can be moved from place to place; and can be ballasted up or down by altering the amount of flooding in buoyancy tanks; they are generally anchored by cable anchors during drilling operations, though they can also be kept in place by dynamic positioning. Semi-submersibles can be used in depths from 600 up to 35,000 feet (180 to more than 10,600 m).
Bideford Dolphin Island Vanguard towing the Bideford Dolphin on the 16-07-09
Transocean Rather Transocean Rather in the Queens Dock at Invergordon on 15-7-09
Brent D, Summer 1978 I spent 123 very long days working on Brown & Root Dredge Barge 316, burying the pipeline from Sullo...
Brent D, Summer 1978 I spent 123 very long days working on Brown & Root Dredge Barge 316, burying the pipeline from Sullo...
Kan Tan IV Kan Tan IV during refit in Geelong Australia. Note new cranes going in to place although It looks li...
Rig Refit Kan Tan IV during refit Geelong Australia.
Orca Mossel Bay FPSO Orca Offshore Mossel Bay, South Africa
FPSO Orca in a storm Offshore Mossel Bay South Africa, some insane seas I tell you - picture #1867 shows the same facili...
Seadrill West Menang - Drilling Tender Taken 26/12/2008 Offshore Republic of Congo Taken during a Lifting gear survey for BCE Inspection ...
Pride South Sea Driller (PSSD) Taken 9/11/2007 Usually offshore South Africa in Mossel Bay. In Cape Town Harbor, getting 4 bliste...
Sedco 709 Drill Rig Taken 18/1/2004 in Cape Town Harbor, on Gavea Lifter Major work carried out, thrusters replaced, bl...
GSF Rig 184 (Development Driller 1) Rig 184 alongside close to the end of construction in Jurong Shipyard Singapore Jan 2005

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