Embodiments disclosed herein describe cylindrical structures with indents configured to reduce vortex induced vibrations (VIV). For example, the cylindrical structures may be configured to reduce VIV for drilling risers subject to ocean currents. In embodiments, the indents may be positioned on an outer surface of the cylindrical structures, wherein the indents may be parallel pairs. The pairs may be mirrored between a first end and a second end of the cylindrical structure, and be positioned in a helical pattern, which may be continuous or staggered.


    Access

    Download


    Export, share and cite



    Title :

    Paired helically indented methods and systems for VIV suppression of drilling riser buoyancy module for fluid submerged cylinders


    Contributors:
    SHI SHAN (author)

    Publication date :

    2018-06-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

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




    RISER MOVABLE BUOYANCY DEVICE

    AUM KI SUNG | European Patent Office | 2021

    Free access

    RISER BUOYANCY CONTROL APPARATUS

    JEONG HYEON SU / PARK GUN IL | European Patent Office | 2017

    Free access

    Role of buoyancy in deepwater riser design

    O'Brien, P.J. / O'Sullivan, E.J. | Tema Archive | 1999