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    Houlder continues conversion work on offshore vessels

    Vessel & ROV News // November 21, 2007

    UK independent design and engineering consultants Houlder Limited has announced the successful completion of another of its design contracts for Subsea 7.

    The project was concluded following the departure of the
    completed offshore support vessel Normand Seven from the A&P Tyne Ltd shipyard, in late October 2007.

    The contract required the provision of the detailed design of a modular pipelay deck and seatings for support of the flexible pipelay equipment on the new build vessel.

    The flexible pipe is stored on 10 reels on the main deck and
    loaded on and off the vessel at the pipe loading terminal.

    Normand Seven has an overall length of 130m and is a dynamically positioned offshore support vessel, on long-term charter from Solstad Offshore to Subsea 7.

    Following the vessel completion in July 2007 in Norway, Normand Seven went to A&P Tyne Ltd shipyard at Hebburn on the south side of the River Tyne, to be fitted with the new pipelay deck and associated equipment.

    Houlder’s work scope involved several months of preliminary design work in early 2006, establishing the vessel general arrangement with Subsea 7, before commencing detailed structural engineering and naval architecture work and CAD drafting at Houlder’s London and Tyneside offices.

    Houlder completed the final designs to Class approval status in the first quarter of 2007.

    Particular emphasis in the pipelay deck design was put on structural weight minimisation while complying with the relevant functional and operational design requirements.

    The vessel is currently heading to Vitoria, Brazil, to commence laying flexible pipelines work for Petrobras on the Roncador project.


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