Double-action power pipe wrench

Details Double-action power pipe wrench Double-action power pipe wrench

2005-07-26

2005-07-26

Meislin, Debra S. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Machine

C081S057200, C081S057140

Reexamination Certificate

active

06920808

ABSTRACT:
An adjustable power wrench is provided for spinning together, and apart, sections of pipe used in long drill strings such as are typically seen in water well and oil drilling. The wrench is preferably designed for use with large diameter drill pipes or rods, including casings. Two sturdy engaging arms, each containing a pair of serrated power rollers driven by a hydraulic motor, are manually positioned about the subject pipe length. The arms are closed about the pipe by two air rams, one for each engaging arm, to engage the serrated rollers and impart spin to the pipe. The apparatus is preferably supported by wire cable in a balanced fashion from the mast of an available drill rig.

REFERENCES:
patent: 1764221 (1930-06-01), Mills
patent: 4221269 (1980-09-01), Hudson
patent: 6065372 (2000-05-01), Rauch

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