Statoil ASA has installed and commissioned about 8,000 km of subsea pipelines in the North Sea area since 1985, including several of the world's largest offshore gas trunklines. Commissioning and pigging these pipelines presented several challanges. The main pipelines in the North Sea are shown on a map. Part 1 of this two-part series will discuss: Commissioning concepts for single and multidiameter pipelines; air drying of internally coated, export-gas-quality pipelines; and dewatering of pipelines with hydrocarbon gas. The following part 2 will examine: Pig design for dual-diameter pigging and environmental aspects of commissioning operations. Both parts will present relevant field experience, as well as recommendations for future projects. Part 2 will elaborate on Statoil's commissioning concept for the 1,200-km Langeled project form Norway to the UK, scheduled for commissioning in 2006 to 2007.


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    Title :

    Extensive subsea commissioning, pigging pose challenges


    Additional title:

    Die norwegischen Pipelines in der Nordsee, Inbetriebnahme und Entwässerung


    Contributors:

    Published in:

    Oil and Gas Journal ; 103 , 43 ; 66-70


    Publication date :

    2005


    Size :

    5 Seiten, 3 Bilder, 4 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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