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).
taken 1981/82. jacket at mouth of loch kishorn getting ready for topside mating
Burning Off Test
Morecambe Flame carrying out test burning of new well at Morecambe Bay Gas Field 1986/7
Passing by the Songa Delta oil rig, near Bergen on 8th November 2012
Marine 105 J/U Rig over the Anoa Production Platform (PremierOil Natuna Sea), Indonesia. c.1998.
GSF Arctic III
Loke Viking running anchor for GSF Arctic III prior to lifting Xmas Tree onboard off Nairn.
FPF1 departing Tees
FPF1 ex AH001 ex Sedco Phillips SS departing Able Tees en route for drydock Gdansk.
In the Cromarty Firth with the NORMAND NEPTUN and the HIGHLAND VALOUR.