McDermott International has won a contract to supply subsea equipment to ExxonMobil for its deepwater Julia field development in the Gulf of Mexico.

The value of the engineering, procurement and construction (EPC) contract was not revealed, but has been included in McDermott’s second quarter 2013 backlog, it said.

The field lies 265 miles southwest of New Orleans in the Walker Ridge area, in a water depth of approximately 2,134m (7,000 ft). Phase I of the project is a subsea tieback to a semisubmersible floating production unit, with McDermott’s workscope including six subsea wells, one six-slot manifold, two umbilicals, six jumpers, two flowlines with two steel catenary risers, two subsea pump modules and topsides support equipment.

Production will flow through two 10-inch production flowlines with subsea single-phase boost pumps. ExxonMobil is the operator with a 50% stake, with Statoil holding the other 50% as partner.

Stephen M. Johnson, Chairman, President and CEO of McDermott, said: “The Julia subsea infrastructure requires a high level of engineering design and construction work, a key component of which is high-specification welding to help ensure long-term integrity and reliability of the subsea facilities. The installation solution we offer provides a high degree of reliability and precision using key vessels in our fleet for deepwater lowering and flexible lay, and further demonstrates our commitment to the subsea market.”

McDermott will undertake engineering, procurement and construction of the jumpers, four suction piles associated with the manifold, subsea pump, pump transformer and Subsea Distribution Unit/Umbilical Termination Assembly, as well as the transportation and installation of the manifold, suction piles, flying leads, subsea pump system, the power and control umbilicals and SDU/UTAs. McDermott will also carry out testing of the tie-back system and mechanical completion before hand over to the customer.

The deepwater installation vessel Derrick Barge 50 is expected to undertake the installation of suction piles and subsea equipment, including the manifold, pump station and transformer, added McDermott. The vessel’s new deepwater lowering system has the capability to lower loads of up to 480 tons in water depths of up to 3,505 m (11,500 ft).

In addition, North Ocean 102 (NO102) is scheduled to transport and install umbilicals, flying leads and jumpers. The NO102 is a fast-transit vessel with a horizontal carousel. Recent improvements to it include installation of a high-capacity flexible- lay system to enable ultra-deepwater installation work – comprising a 330-ton top-tension flex-lay tower, with 275-ton active heave compensation crane and 330-ton hang-off clamp capable of lowering loads to a depth of 3,048 m (10,000 ft).