Boring or penetrating the earth – Processes
Patent
1978-05-08
1980-03-25
Pate, III, William F.
Boring or penetrating the earth
Processes
173164, 175 85, 175320, 285 39, 403 19, E21B 17042, E21B 1916
Patent
active
041945794
ABSTRACT:
A drilling apparatus including improved means for drill string manipulation for effecting an improved method of drill steel breakout and disassembly.
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Bailey Edward A.
Ordway James F.
Brams J. Stewart
Joy Manufacturing Company
Pate III William F.
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