A method of installing a steel catenary riser comprises progressively unspooling and launching the riser from a reel-lay vessel. The riser is plastically deformed in a straightening process aboard the vessel downstream of unspooling and upstream of launching the riser. The straightening process is adjusted to form a series of two or more residual curvature loops of locally increased curvature in a length of the riser suspended in the water column above a touch-down point. Successive loops of the series are separated and joined by a straighter portion of the riser of lesser curvature than those loops. Buoyancy elements are attached to at least one straighter portion of the riser above at least one of the loops of the series, or between successive loops of the series, or above the series of loops.


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    Title :

    IMPROVING FATIGUE RESISTANCE OF STEEL CATENARY RISERS



    Publication date :

    2024-11-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    E21B EARTH OR ROCK DRILLING , Erd- oder Gesteinsbohren / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS / F16L PIPES , Rohre



    IMPROVING FATIGUE RESISTANCE OF STEEL CATENARY RISERS

    ASGARI PEYMAN / DE MORAES TAKAFUJI FERNANDA CRISTINA / RAMIRO AMORIM ANDRE et al. | European Patent Office | 2024

    Free access

    IMPROVING FATIGUE RESISTANCE OF STEEL CATENARY RISERS

    ASGARI PEYMAN / DE MORAES TAKAFUJI FERNANDA CRISTINA / RAMIRO AMORIM ANDRE et al. | European Patent Office | 2025

    Free access

    IMPROVING FATIGUE RESISTANCE OF STEEL CATENARY RISERS

    ASGARI PEYMAN / DE MORAES TAKAFUJI FERNANDA CRISTINA / RAMIRO AMORIM ANDRE et al. | European Patent Office | 2023

    Free access

    IMPROVING FATIGUE RESISTANCE OF STEEL CATENARY RISERS

    ASGARI PEYMAN / DE MORAES TAKAFUJI FERNANDA CRISTINA / RAMIRO AMORIM ANDRE et al. | European Patent Office | 2025

    Free access

    IMPROVING FATIGUE RESISTANCE OF STEEL CATENARY RISERS

    ASGARI PEYMAN / DE MORAES TAKAFUJI FERNANDA CRISTINA / RAMIRO AMORIM ANDRE et al. | European Patent Office | 2023

    Free access