Blast hole drill pipe gripping mechanism

Details Blast hole drill pipe gripping mechanism Blast hole drill pipe gripping mechanism

B - Operations, Transporting

25

B

B25B 13/50 (2006.01) E21B 17/08 (2006.01)

Patent

CA 2440176

The present invention provides a method of loosening a threaded joint between first and second members, comprising grasping the second member to prevent rotation thereof, advancing one end of an arm having a grip into contact with one side of the first member, advancing a jaw having a grip into contact with another side of the first member to clamp the first member between the grips, further advancing the one end of the arm while retracting an opposite end of the arm to rotate the first member, and releasing the contact of the grips with the first member. The present invention also provides a related mechanism and wrench.

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