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).
At night in Table Bay
The location is Table Bay, Cape Town. This oil rig picture was taken during November 2011 on a clear...
The Borgsten Dolphin being towed by the Maersk Tender in the Cromarty Fith on 17.12.11
Semi-Sub John Shaw
Semi-Submersible Rig John Shaw under tow in the Moray Firth. I have assumed that it has left the Cro...
Noble Homer ferrington
I took this Pic when the Rig was undergoing general maintenance in Malta. This Pic was taken on 26th...
Rig Floor (snap taken in December 1983)
Bonito-1; New Year 1984
Our Catering Crew on 1984 New Year's day; little did we know there was going to be a blow-out 11/12 ...