US-based Anadarko Petroleum has selected engineering company McDermott International for subsea tieback in deepwater Gulf of Mexico.

As part of the subsea umbilical and flowline installation contract, McDermott will support Anadarko’s phase II development of the Caesar / Tonga field located in the US Gulf of Mexico.

This phase is being developed as a tieback to the Anadarko-operated Constitution spar, located in Block Green Canyon 726 and 727, in about 5,000ft of water.

McDermott’s scope of work will include project management; engineering, fabrication and installation of two 7,700ft long pipe-in-pipe (PIP) insulated rigid flowlines terminated by pipeline end terminations (PLETs) on either end.

The company will also install one subsea manifold and associated jumpers; a 72,000ft long subsea control umbilical and associated flying leads; and is responsible for pre-commissioning.

McDermott’s deepwater rigid reel-lay vessel LV105 would be used to complete offshore installation in late 2016.

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"McDermott’s deepwater rigid reel-lay vessel LV105 would be used to complete offshore installation in late 2016."

The North Ocean 102 deepwater flexible lay vessel is expected to complete the umbilical installation and subsea construction scope of work.

McDermott International vice-president for Americas, Europe and Africa Scott Munro said: "The combination of our pipe-in-pipe experience, efficiency of the Lay Vessel 105 (LV105) and our Gulfport spoolbase led McDermott to secure this important contract from Anadarko."

The work related to the overall project management and engineering has been started by McDermott’s operating centre in Houston, Texas.

The company’s spoolbase facility in Gulfport, Mississippi will be responsible for assembly and fabrication of PIP flowlines.

Image: Lay Vessel 105 and North Ocean 102 are docked to support operations at McDermott’s spoolbase facility in Gulfport, Mississippi. Photo: courtesy of McDermott International, Inc.