Options for deepwater repair of pipes and flanges - Part 2

摘要

This paper examines the options for repair of pipelines and their flanged joints in deep water. In Part 1, published in our June issue, the problems associated with the use of pipe-repair clamps at depths beyond the reach of divers were discussed, as was the choice of full enclosure versus injected-seal repairs for flanged joints. Part 2 concludes this topic, and continues with a case study on an operation in which a defective flanged connection on a 10-in water-injection line was repaired in BP's West of Shetland Foinaven field. This operation, conducted entirely by ROV in 500m of water, is believed to represent a world first.