Toggled breakout wrench

Details Toggled breakout wrench Toggled breakout wrench

1995-02-22

1996-07-23

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5719, 81572, B25B 1350

Patent

active

055379001

ABSTRACT:
A Toggled Breakout Wrench is described for use with a drilling rig having a drill stem made up of one or more drill pipe sections. The wrench comprises an arm movably connected to the drilling rig such that the arm will move in a substantially arctuate path about a drill pipe section. Pivotally mounted to the arm are a pair of opposed jaws for clamping about the drill pipe section to assist in breaking loose the threaded connections of the drill pipe sections. A toggle linkage enables the opposed jaws to move between a clamping and a non-clamping position about the drill pipe section.

REFERENCES:
patent: 2737839 (1956-03-01), Paget
patent: 3316783 (1967-05-01), Wilson
patent: 3398612 (1968-08-01), Batten
patent: 3662867 (1972-05-01), Kinzbach
patent: 3892148 (1975-07-01), Wiley
patent: 4023449 (1977-05-01), Boyadjieff
patent: 4194419 (1980-03-01), Mitchhart et al.
patent: 4696207 (1987-09-01), Boyadjieff

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