ROTATION BIT Russian patent published in 1994 - IPC

Abstract RU 2012765 C1

FIELD: well rotary drilling. SUBSTANCE: core receiving cavity is made in form of through transverse recess. Working surface of core splitter is made in form of bottom part of recess and turned in horizontal plane in direction opposite to bit rotation. EFFECT: higher efficiency. 2 cl, 2 dwg

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RU 2 012 765 C1

Authors

Krasnik V.G.

Dates

1994-05-15—Published

1991-03-29—Filed