A down-the-hole hammer tool that is actuated by drilling mud has been tested recently in simulated borehole conditions. Improvements in drilling rate on the order of 20% to 300% have been noted during these tests, depending on drilling conditions. Further laboratory testing has shown a potential improvement in these benefits by changes to valve timing. In addition, bit design and component life issues are discussed.


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    Title :

    Rotary-percussive drilling engine


    Contributors:


    Publication date :

    1998


    Size :

    Seiten



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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