Shell Offshore Inc. has let a contract to Technip SA for development of subsea infrastructure for the Stones project in the Walker Ridge area of the US Gulf of Mexico.
Included in the service are two subsea production tiebacks to the floating production, storage, and offloading vessel (OGJ Online, July 23, 2013). The field lies in 2,930 m of water along the pipelay route.
The contract covers engineering of the required second pipeline end terminations (PLET); fabrication of the PLET and piles; and installation of the subsea production system, including associated project management, engineering, and stalk fabrication.
The production system comprises dual 8-in. insulated flowlines with PLET involving a manifold and associated suction piles installed as part of the system.
Technip’s operating center in Houston will perform the overall project management. Flowlines will be welded at the company’s spoolbase in Mobile, Ala. The offshore installation is scheduled to be performed by the Deep Blue, Technip’s flagship vessel for deepwater pipelay.
Technip in 2013 received a contract from Shell that included installation of the Stones lateral gas pipeline (OGJ Online, Aug. 23, 2013).
