McDermott bags subsea tieback job on LLOG’s Stonefly project

McDermott has been awarded a sizeable contract by LLOG for deepwater subsea pipeline tiebacks and structures from the Stonefly development to the Ram Powell platform, located approximately 140 miles southeast of New Orleans, Louisiana.

McDermott’s spoolbase in Gulfport, Mississippi. Source: McDermott

LLOG sanctioned the development of the Stonefly discovery in the Gulf of Mexico in September 2018 with plans to start first production in December 2019.

McDermott said on Monday that its scope of work includes project management, installation engineering, subsea structure and spoolbase stalk fabrication, and subsea installation of the subsea infrastructure to support a two well subsea tieback from the Stonefly development site to the Ram Powell platform via a 60,000 foot 6-inch pipeline at water depths ranging from 3,300 to 4,100 feet.

McDermott will also design, fabricate, and install a steel catenary riser, a pipeline end manifold, and two in-line sleds.

“This award demonstrates McDermott’s commitment to helping LLOG safely and competitively deliver the Stonefly development,” said Richard Heo, McDermott’s Senior Vice President for North, Central and South America.

The Stonefly development includes the Viosca Knoll 999 area where McDermott is scheduled to use its 50-acre spoolbase in Gulfport, Mississippi, for fabrication and reeled solutions. McDermott is scheduled to install the subsea tiebacks and structures using its North Ocean 105 vessel in the third quarter of 2019. Structure design and installation engineering began in January 2019 in McDermott’s Houston office.

McDermott defines a sizeable contract as between $1 million and $50 million. The lump sum contract award will be reflected in McDermott’s first quarter 2019 backlog.

The Ram Powell tension leg platform is located in 3,200 feet of water in Viosca Knoll Area, Block 956, and is capable of processing 60,000 barrels of oil per day and 200 million cubic feet of gas per day.

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