Boskalis_Annual Report_2017

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UNIQUE INSTALLATION OF THE WORLD’S LARGEST SPAR-FPSO TOPSIDE

Boskalis was responsible for both the transportation of the Aasta Hansteen SPAR substructure and topside from South Korea to Norway and the topside installation. In this remarkable project the company transported the heaviest SPAR-FPSO ever, carried out the largest catamaran barge construction and topside float-over, and worked more than 100,000 hours without a single lost time injury.

“To provide some background frst. The Aasta Hansteen SPAR-FPSO is a gas production and storage platform, which will be operated at the Aasta Hansteen feld, approximately 300 kilometers off the coast of Norway, above the Arctic Circle in depths of more than 1,300 meters. The SPAR consists of the hull/substructure and a topside”, says Project Director Bas Polkamp. “Hyundai Heavy Industries (HHI) contracted Dockwise to carry out the transport of the SPAR hull from the fabrication yard in Ulsan, South Korea, to a fjord near Stavanger in Norway. As such, a ‘relatively straightforward’ part of the operation, even though it is a huge structure. Just the hull alone is an enormous cylindrical buoy with a diameter of 50 meters, length of 198 meters and weight of 46,000 tons. The hull was transported horizontally on our semi-submersible heavy transport vessel Vanguard via the Cape of Good Hope in 59 days, arriving in Norway at the end of June. Subsequently, we