McDermott International Ltd has completed the KG-D6 R Cluster subsea field development project and achieved pre-commissioning and ready for startup for Reliance Industries Ltd., in the Krishna Godavari Basin, located off the east coast of India. McDermott used its Derrick Lay Vessel 2000 to perform its first S-lay piggy-back pipelay.
For the KG-D6 R Cluster project, McDermott built a yard facility in India for the fabrication of risers, jumpers and marine logistics support. The project comprised two offshore campaigns. During the first campaign, the DLV 2000 completed McDermott's first piggy-back pipelay in S-lay mode (18-inch plus a four-inch) in 4,265 feet (1,300 meters) water depth. It also included the installation of the first ever ultra-deepwater structure, weighing 343 tons, for the DLV 2000. Several six-inch pipelines, PLETs and manifolds were installed in water depths up to 6,447 feet (1,965 meters). In addition, McDermott installed India's longest dual riser.
The second campaign included installation of manifolds, manifold piles, flowlines, PLETs (S-mode and J-mode), in-line structures, jumpers and umbilicals in ultra-deepwater depths, together with major brownfield modifications to Reliance's control and riser platform. Successful flowline and umbilical installation were completed in 6,561 feet (over 2,000 meters) water depth using McDermott vessels: DLV 2000; Lay Vessel 108; North Ocean 102.