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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).
Maersk Highlander Boarding Card From 1988, the only rig that I worked on that gave you a half decent boarding card.
Pride South Seas Photo Taken on 1 Sept 2009 The Pencil column on the right of the screen with the scaffolding, was h...
Ocean Patriot (Diamond Offshore) Night shot, of this Drill Rig in Portland, Victoria, Australia.
Pride South Seas Picture taken on 8 Sept 2009 The PSS getting repairs done in the harbor. We had to go in 10:30pm...
Transocean Omega Transocean Omega on test off South Africa, spring 2001.
Stena Don Stena Don in the fjords in Northern Norway picture taken on 14-09-09.
West Alpha Maersk Tackler towing the West Alpha on the 20-09-09
West Alpha West Alpha in the fjords on the 22-09-09
Ocean Nomad Invergordon 15.10.2009 Rig Type Semisubmersible Rig Location UK North Sea Rig Design Enhance...
GSF Arctic II Semi Submersible GSF Arctic II taken on 25th of October 2009 in Invergordon
Borgsten Dolphin & Ocean Guardian Borgsten Dolphin (left) & Ocean Guardian taken in Invergordon on the 25th of October 2009. Unknown r...
Transocean Rather Dropping anchors in the Cromarty Firth, 11th October 2009.

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