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Oil Rig Photos

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Oil Rig Photos
No: 2370   Contributor: Bjorn Ottosen   Year: 2015

The MCDERMOTT DERRICK BARGE No102 is a semi-submersible crane vessel. It was constructed in 1985 as McDermott Derrick Barge No.102 for McDermott by Mitsui Engineering & Shipbuilding Co., Ltd.. In 1997 it was taken over by Heerema Marine Contractors after discontinuation of their joint venture with McDermott, HeereMac.
The Thialf has two cranes with a combined maximum lifting capacity of 14,200 metric tons, making it the largest crane vessel in the world. It is equipped with a class III dynamic positioning system for position keeping in deep waters. For position keeping, the Thialf is fitted with six 5,500 kW retractable azimuthing thrusters. For shallow waters there are 12 Flipper Delta anchors, 22.5 t, with 2,500 meter, 80 mm mooring wire.
The hull consists of two pontoons with four columns each. Transit draught is about 12 meters. For lifting operations it will normally be ballasted down to 26.6 meters. This way the pontoons (with a draught of 13.6 meters) are well submerged to reduce the effect of waves and swell.
It is able to accommodate 736 people.

Photo was taken in Hjeltefjorden, August 25.1994
Picture added on 27 March 2015 at 14:18
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