Special care must be taken to maintain the integrity of the coiled tubing when performing subsea well intervention from a light vessel without the use of a riser. In these cases the coiled tubing will act as a riser with respect to withstanding the external loads from waves, current and vessel motions. To avoid local buckling of the coiled tubing as it enters the subsea lubricator it is important to keep the vessel positioned such that the bending of the coiled tubing is kept as small as possible. This paper will outline a method for estimating the optimal set point for the vessel position during riser less coiled tubing operations. The method is based on a combination of measurements and analytical methods for description of the structural behaviour of coiled tubing and the subsea stack. The analytical method developed is compared to simulations using commercial riser analyses software.


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    Titel :

    Coiled tubing and vessel motions for riserless coiled tubing systems


    Beteiligte:


    Erscheinungsdatum :

    2004


    Format / Umfang :

    10 Seiten, 8 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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