Subsea 7 wins $150-million contract for Maersk’s Culzean

LUXEMBOURG -- Subsea 7 has won a subsea, umbilical, riser and flowline (SURF) contract from Maersk Oil, with a value in excess of $150 million, for the Culzean development.

The ultra-high pressure, high temperature field, one of the largest gas discoveries offshore UK, is located in Block 22/25 of the Central North Sea at a water depth of approximately 90 m.

The contract scope includes project management, engineering, procurement, construction and installation of a 22-in. diameter, 52-km gas export pipeline connected to the Central Area Transmission System (CATS), and a 3.6-km pipe-in-pipe (10-in. outer pipe and 6-in. inner pipe) providing insulation for the transportation of the condensate to the in-field Floating, Storage and Offloading facility (FSO).

The pipe-in-pipe will be laid with a 4-in. piggy-back line that will transport fuel gas to the FSO. Subsea 7 will also provide subsea structures, tie-ins to the Culzean platform facilities and pre-commissioning expertise.

Project management and engineering work will commence immediately from Subsea 7's Aberdeen office. Offshore activities will utilize a number of Subsea 7 vessels including the pipelay and heavy-lift vessel, Seven Borealis. Offshore operations are scheduled to commence in 2017.