McDermott Executes Jack and St. Malo Gig in GoM

McDermott International has successfully completed the Jack and St. Malo project for Chevron U.S.A. Inc.

McDermott subsea construction vessel NO102 installed umbilicals totaling 65 miles along with other related subsea structures.

The project involved the installation of jumpers, flying leads, subsea pump stations, umbilicals and subsea landing of some of the industry’s largest and complex umbilical end terminations to a host floating production platform in 7,200 feet of water 279 miles offshore Louisiana. The project is part of the first stage of development of the Jack South, St. Malo South and St. Malo North Drill Centers.

McDermott executed in-house fabrication of 21 high specification rigid flowline, manifold and pump jumpers and installed the structures using the Derrick Barge 50 (DB50) with its specialized deepwater lowering system. In addition, more than 80 flying leads, five additional rigid production well jumpers and other subsea control and production boost components were installed by the DB50 – including three pump stations each weighing 209 tons to a depth of 6,988 feet. The DB50 was assisted by a fleet of up to 12 support vessels delivering material from various Gulf Coast fabrication and staging facilities to the offshore installation site.

Additionally, three control and two power umbilicals totaling 65 miles were transported and installed by the subsea construction vessel North Ocean 102 (NO102) along with other related subsea structures.

“Our ability to fabricate the jumpers in house and utilize the combined strengths of the DB50’s deepwater lowering system and the high payload and top tension capacity of the NO102’s 330-ton vertical lay system allowed McDermott to deliver an integrated subsea solution for our client on this complex deepwater project,” said Tony Duncan, Executive Vice President Subsea.

“As the industry moves into deeper water, McDermott continues to tailor its subsea engineering expertise, fabrication facilities, and global fleet of specialized vessels to meet the evolving technical needs of our clients.”

Located in the Gulf of Mexico Walker Ridge Area, the Jack and St. Malo fields are jointly being developed with a host floating production unit.