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Ingersoll Rand Co
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Ingersoll Rand Co
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Application filed by Ingersoll Rand CofiledCriticalIngersoll Rand Co
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Publication of FR401146ApublicationCriticalpatent/FR401146A/fr
E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B1/00—Percussion drilling
E21B1/12—Percussion drilling with a reciprocating impulse member
E21B1/24—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure
E21B1/30—Percussion drilling with a reciprocating impulse member the impulse member being a piston driven directly by fluid pressure by air, steam or gas pressure
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FR401146A1909-03-231909-03-23Perfectionnements apportés aux machines pour l'exploitation des mines
ExpiredFR401146A
(fr)