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).
Northern Producer picture taken on 04/04/09 from the Maersk Tackler
GSF Arctic II
GSF Arctic II at anchor in the Cromarty Firth.Photo taken on a beautiful early morning (0530!) 8th J...
West E-drill (Now West Phoenix) aboard Blue Marlin at Samsung Shipyard, Geoje Island, Korea, 6th Aug...
West E-drill (now West Phoenix) at Samsung Shipyard, Geoje Island, Korea, 7th august 2007.
Stena Tay during riser operations while working out of Vittoria, Brazil, 17th August 2003.
GSF Arctic II
Stacked at Invergordon, the Cromarty Firth, Scotland.
Deepsea Atlantic alongside CCB Bergen. Picture taken on 10-6-09
Bideford Dolphin being towed through the Fjords on it's way to location on the 16-07-09