Drilling rig breakout wrench system

Details Drilling rig breakout wrench system Drilling rig breakout wrench system

1992-12-23

1993-08-03

Meislin, D. S.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5718, 81 5735, B25B 1350

Patent

active

052318990

ABSTRACT:
A pair of bi-directional breakout wrenches on a drilling rig, each wrench including a body member having an inside cam surface with a plurality of locking cogs positioned around the cam surface, each cog being rotatably journaled on a shaft with a loose-fit allowing the cogs limited lateral movement and a pair or side plates positioned on the sides of the body member supporting the cog shafts, the side plates including a handle for rotation of the side plates relative to the wrench body causing the locking cogs to engage the cam surface and move inwardly gripping the drill pipe section. One of said wrenches being attached to a linear actuator providing rotative torque to the wrench body for breaking open a threaded drill string joint while the other wrench retains the string from movement.

REFERENCES:
patent: 2737839 (1956-03-01), Paget
patent: 3239016 (1966-03-01), Alexander
patent: 3662862 (1972-05-01), Kinzbach
patent: 3799009 (1974-03-01), Guier
patent: 4023449 (1977-05-01), Boyadjieff
patent: 4372026 (1983-02-01), Mosing
patent: 4437218 (1984-03-01), Pridy
Failing Equipment Supply Catalog 7th Edition, Section 4, p. 9; Section 5, p. 10 and Section 15, pp. 15, 16 and 17.

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