Automatic breakout wrench with floating gripping dies

Details Automatic breakout wrench with floating gripping dies Automatic breakout wrench with floating gripping dies

E - Fixed Constructions

21

B

E21B 19/14 (2006.01) B25B 13/50 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2472537

A die assembly for a drilling machine adapted to use drill pipe with a longitudinal axis, the drilling machine including a pipe turning wrench including a first arm and a second arm pivotable about an axis spaced apart from and parallel to the pipe longitudinal axis, and a die pocket, in the one of the wrench first arm and wrench second arm, that is adapted to receive the die assembly. The die assembly is adapted to be attached to one of the wrench first arm and the wrench second arm, and the die assembly includes a die having a pipe facing front spaced apart from but parallel to the pipe longitudinal axis, a wrench facing rear, and twa spaced apart opposed sides, each connected to the die front and die rear. The die is thick on one side and thin on the other side so that the die facing front has a face that recedes from the pipe from one edge to the other edge so that contact between the die facing front varies depending upon the diameter of the pipe. The die rear also has a convex curve so that the die has a thick mid section.

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