North Sea Pipelines- Conclusion: Dual-diameter pigging reaches new extremes; Langeled looms

11/28/2005
Statoil has extensive experience in both dual-diameter pigging of subsea pipelines and the environmental ramifications of pipeline commissioning. This second article in a two-part series discusses pig design for dual-diameter systems and the environmental aspects of commissioning operations, presenting relevant field experience.This concluding article also elaborates on Statoil’s commissioning concept for the 1,200-km Langeled project from Norway to the UK, scheduled for commissioning in 2006-07.The first part of the series (OGJ, Nov. 21, 2005, p. 66) discussed commissioning concepts for single and multidiameter pipelines; air drying of internally coated, export-gas-quality pipeline...
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