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Expired
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Alfred Julius Boult
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Individual
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Individual
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Publication of GB190919759ApublicationCriticalpatent/GB190919759A/en
E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B10/00—Drill bits
E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
Abstract
19,759. Boult, A. J., [Sulzer, E.]. Aug. 28. Drilling-machines.-In a rotary rock drill with a grinding-bit, the bit a is driven at a high speed by an electric. fluid-pressure, or other motor c and is pressed lightly against the rock by a slow-threaded feed-screw, or a weak spring &c. The machine is mounted on gimbals f, g, on a bracket fixed to a standard e. Rinsing-fluid is supplied through a pipe d to two ports in the drill head.
GB190919759D1909-08-281909-08-28Improvements in or relating to Rotary Rock Drills.
ExpiredGB190919759A
(en)