The present disclosure generally relates to jack-up units employing a multi-purpose derrick structure for drilling, plug, abandonment, and decommissioning operations. The multi-purpose derrick structure includes a mast that may be vertically oriented in a first configuration to facilitate drilling, plug, and abandonment procedures, or may be pivotably positioned in a second configuration for decommissioning operations or other procedures. In the pivoting position, the mast functions as a heavy lift crane. One or more selective pivoting structures at the base of the multi-purpose derrick structure, and one or more actuators, facilitate the multiple uses of the multi-purpose derrick structure.


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    Title :

    DRILLING, PLUG, ABANDONMENT, AND DECOMMISSIONING


    Contributors:
    MAINI RAMESH (author) / DEUL HANS (author)

    Publication date :

    2018-04-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B66C Krane , CRANES / E02B HYDRAULIC ENGINEERING , Wasserbau / E21B EARTH OR ROCK DRILLING , Erd- oder Gesteinsbohren




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