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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).
Jim Cunningham Jim Cunningham in Port Louis (Mauritius) on its way to Port Dickson stopped for crew change etc. Ta...
Stena Clyde Stena Clyde undergoing refurbishment by Keppel FELS.
Maersk Discoverer Shot Dec 18th 2009 off the coast of Bali whilst the rig was in transit from Singapore to Australia....
Maersk Developer Shot March 19th 2010 as the rig left Singapore on her maiden voyage and traversed the Straits of Mal...
JW Mclean & Skandi Inspector JW Mclean & Skandi Inspector on location Broom field Northern North Sea
Maersk Deliverer completing deepwater trials The Maresk Deliverer completing her deep water trials 90 N miles west of Phuket in Thailand. June 26...
MSV Semi 1 Now working in the Gulf of Mexico
West Vanguard The drilling platform West Vanguard, in Hjeltefjorden, Norway, mid. '90 assisted by, M/V Bison and M...
Noble Homer Ferrington Noble Homer Ferrington at anchor off Misurata (Libya) waiting to go on hire to BP July 2010
Noble Homer Ferrington Noble Homer Ferrington at anchor of Misurata (Libya) waiting to go on hire to BP Picture taken from ...
Deepsea Bergen Drilling rig Deepsea Bergen at CCB, (Coast Center Base), Aagotnes, west of Bergen. Date: Unknown
Borgsten Dolphin One of the legs being removed at Invergordon, roughly start of 2010

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