Holding wrench for drill strings

Details Holding wrench for drill strings Holding wrench for drill strings

1975-09-30

1976-09-14

Purser, Ernest R.

Tool driving or impacting

Impacting devices

Hammer head moves in arcuate path or rotates

81 523, 81 5716, 173164, 175 85, 166 775, 166315, E21B 300

Patent

active

039801438

ABSTRACT:
Apparatus for holding and supporting a string of connected drill pipe sections which are suspended in a bore hole and for assisting in separating one drill pipe section from the string when the string is being disassembled.

REFERENCES:
patent: 2570080 (1951-10-01), Stone
patent: 3239016 (1966-03-01), Alexander
patent: 3291225 (1966-12-01), Foran
patent: 3446284 (1969-05-01), Dyer et al.
patent: 3463247 (1969-08-01), Klein
patent: 3708024 (1973-01-01), Back
patent: 3771389 (1973-11-01), Coyne

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