A method of providing buoyancy, the method comprising the steps of: (a) adding a buoyant fluid to a container, the buoyant fluid comprising a base fluid, an activator and from 25 to 60% vol/vol microspheres; and (b) increasing the viscosity of the buoyant fluid to at least 80,000mPa·s at a shear rate of 0.8s-1 at 293K. The structure may be a tubular-shaped container that is used subsea, such as a frame of a cable laying plough. Embodiments thus provide a convenient method of adding buoyancy to a structure.


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    Title :

    Method of providing buoyancy


    Additional title:

    Verfahren zur Erzeugung von Auftriebskraft
    Procédé permettant d'assurer la flottabilité


    Contributors:

    Publication date :

    2017-05-17


    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 / F16L PIPES , Rohre



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