There is provided a method and apparatus for lowering and/or raising a load or structure to or from the bed of a body of water. The apparatus comprises a buoyancy apparatus configured to be coupled to a load, and having positive buoyancy sufficient to lift the load. At least one receptacle is provided on the apparatus for receiving a control weight lowered from a vessel to lower or raise the assembly. The lowering method includes forming an assembly from a buoyancy apparatus and a load and submerging the assembly to a position at a first height above the bed. In a preferred embodiment the assembly is submerged by a clump weight tow system. A control weight is deployed from a vessel to the assembly to overcome the positive buoyancy of the assembly and thereby lower the load from the first height to the bed. The raising method reverses the steps of the lowering method.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Method and apparatus for subsea installations


    Beteiligte:

    Erscheinungsdatum :

    2015-06-11


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

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



    METHOD AND APPARATUS FOR SUBSEA INSTALLATIONS

    JOENSEN ARNBJORN / PAUL SAMUEL DAVID IRVINE | Europäisches Patentamt | 2017

    Freier Zugriff


    Variable speed drive for subsea installations, vessels, and/or vehicles

    BØ OVE | Europäisches Patentamt | 2015

    Freier Zugriff

    SUBSEA CLEARING APPARATUS

    CROWTHER PAUL ANTHONY / STEVENSON JAMES ANDREW | Europäisches Patentamt | 2019

    Freier Zugriff

    SUBSEA MONITORING APPARATUS

    WILSON ROSS | Europäisches Patentamt | 2022

    Freier Zugriff