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Technip to lay the world’s deepest gas pipeline, for Shell in the Gulf of Mexico

23 August 2013

Shell Offshore Inc. has awarded Technip an engineering, procurement and installation contract for the development of subsea infrastructure for the Stones field. This field is located in the Walker Ridge area in the US Gulf of Mexico (GOM), at a water depth of approximately 2,900 meters (9,500 feet). This development will host the deepest floating, production, storage and offloading (FPSO) unit in the world and will be Shell’s first FPSO in the Gulf of Mexico.

This will be the second FPSO in the GOM for which Technip installed the riser.

Technip will be in charge of installation of the subsea production system and Stones lateral gas pipeline, inclusive of associated project management, engineering and stalk fabrication.

The production system comprises dual 8-inch insulated flowlines associated with pipeline end termination (PLET), and dual 8-inch steel lazy wave riser (SLWR). The Stones lateral gas pipeline comprises a single 8-inch gas pipeline associated with PLET, in-line sled, and a single 8-inch SLWR.

A flowline is a flexible or rigid pipe, laid on the seabed, which allows the transportation of oil/gas production or injection of fluids. Its length can vary from a few hundred meters to several kilometers. A riser is a pipe or assembly of pipes used to transfer produced fluids from the seabed to the surface facilities or to transfer injection fluids, control fluids or lift gas from the surface facilities and the seabed.

Technip’s operating center in Houston, Texas will perform the overall project management. The flowlines and risers will be welded at Technip’s spoolbase in Mobile, Alabama.

The offshore installation is expected to be performed in the second half of 2014 by the Deep Blue, Technip’s deepwater pipelay vessel.

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