ROLLING DRILLING BIT Russian patent published in 2011 - IPC E21B10/22

Abstract RU 2426858 C1

FIELD: mining.

SUBSTANCE: bit consists of the following individual parts: housing, bearing assembly in housing, bit with trunnion and locking device to fix the trunnion in housing in the form of locking ring. Inclination angle α of bit trunnion to horizontal plane, which is in the range of 95-125°, to bit axis, which is within 5-35°.

EFFECT: increasing the bit drifting owing to optimum distribution of radial axial loads.

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RU 2 426 858 C1

Authors

Gorbunov Sergej Andreevich

Dates

2011-08-20—Published

2010-03-15—Filed