GREEN4SEA Conference & Awards

7 Mar 2018
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GREEN4SEA Conference & Awards

7 Mar 2018
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Video: Spar platform completed off Norway

spar platform

Boskalis completed a dual vessel float-over operation of the Aasta Hansteen topside. Boskalis contributed in the transportation of the Aasta Hansteen SPAR from South Korea to Norway and the topside installation.

The Aasta Hansteen FPSO SPAR is a gas production and storage platform that will be operated by Statoil on the Aasta Hansteen field approximately 300 kilometers off the coast of Norway.

The SPAR consists of a lower part, referred to as the hull or substructure, and the topsides on top of the SPAR hull.

The SPAR hull was transported horizontally by Boskalis from the yard in South Korea to a fjord near Stavanger in Norway.

The third and final phase of the operation was the installation of the topside on top of the SPAR hull. The topside was transferred onto two S-class vessels. After these two vessels were positioned, they started un-ballasting.

The result was a sort of catamaran structure with the topside linking the two hulls. Last weekend, the catamaran structure with the topside was towed out to the vertical SPAR hull. Once everything was positioned above the substructure, the mating operation between the hull and topside was completed.

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