Awarded by Acergy Borealis for 17 units of cranes for a pipe-laying vessel

One of the leading global contractors specialises in seabed-to-surface engineering, construction and services to the offshore energy industry worldwide. To match the evolving needs of deep-water subsea developments, Subsea 7 promises to set a new benchmark in the subsea world with the state-of-art strategic enabler – Seven Borealis, DP pipe lay and Heavy Lift Construction Vessel.

One major feature of the 182.2m long Swiss Army knife is the deep-water S-lay capability. Flexibility and productivity was key.

From the port, single joint pipe sections were fed into the firing line running along the length of the vessel to be welded into a continuous pipeline. After the firing line, the pipeline passed over the vessels stinger at the stern and was lowered to the seabed in an S-shaped curve.

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