DRILLING BIT Russian patent published in 2013 - IPC E21B10/42 E21B7/24 

FIELD: mining.

SUBSTANCE: drilling bit comprises a body with an attachment thread and blades reinforced with rock-breaking elements installed at different angles to the axis. The bit is equipped with a vibration unit made in the form of a composite threaded bushing, rigidly connected to the bit, and placed in the bushing cavity with the possibility of axial displacement of a striker with a geared end for interaction with revolution solids placed in grooves made at the end of the threaded bushing facing the geared end of the striker. The bit may be equipped with a spring arranged in the cavity between ledges formed on the inner surface of the upper part of the bushing and the outer surface of the striker.

EFFECT: increased efficiency of bit operation, especially when drilling in rocks prone to sticking.

2 cl, 2 dwg