The company carried out installation of a 343-tonne weighing ultra-deepwater structure, among others, for the ultra-deep-water project in the Bay of Bengal

McDermot-Derrick Lay Vessel

McDermott employed the DLV 2000 offshore supply ship for executing the R Cluster gas project in India. (Credit: McDermott)

McDermott International has wrapped up the R Cluster field development project for Reliance Industries in the KG-D6 block in the Krishna Godavari Basin, offshore India.

The US-based contractor said that it has achieved pre-commissioning for the ultra-deep-water gas field, which produced its first gas in December 2020.

Located off the coast of Kakinada town, the R Cluster field is contained in water depth of over 2,000m. The project features a subsea production system that is tied back to KG D6 control and riser platform (CRP), nearly 60kms apart, through a subsea pipeline.

McDermott Asia Pacific senior vice president Ian Prescott said: “The safe and successful completion of Reliance’s KG-D6 R Cluster project is a testament to McDermott’s subsea experience in the Bay of Bengal.

“Pre-commissioning and ready for startup was achieved despite difficult circumstances—two severe cyclones during the first campaign and, in the second, navigating the challenging conditions of COVID-19.”

McDermott built yard facility in India for the project

For the R Cluster project, McDermott constructed a yard facility in India, which was used for the fabrication of risers, jumpers, and marine logistics support.

The project was made up of two offshore campaigns.

McDermott revealed that the first campaign saw the Derrick Lay Vessel (DLV) 2000 offshore supply ship complete the company’s first piggy-back pipelay in S-lay mode in water depth of 1,300m.

The first campaign also included the installation of a 343-ton weighing ultra-deepwater structure.

McDermott, under the same campaign also installed various six-inch pipelines, pipeline end terminations (PLETs), and manifolds in water depths up to 1,965m. The company also installed what is claimed to be the longest dual riser in India.

Under the second campaign, the company installed manifolds, manifold piles, flowlines, S-mode and J-mode PLETs, jumpers, in-line structures, and umbilicals.

It also carried out major brownfield modifications to the KG D6 control and riser platform.

The R Cluster project is estimated to reach plateau gas production of nearly 12.9 million standard cubic meters per day (mmscmd) in the course of this year.

Reliance Industries is partnered by BP in the offshore gas project. The partners are also developing the Satellites Cluster and MJ gas projects in the same offshore block.

The combined investment for the three gas projects is INR350bn ($4.77bn).