DRILLING BIT Russian patent published in 2018 - IPC E21B10/38 

FIELD: construction; mining.

SUBSTANCE: invention relates to mining and construction – to drilling tools when drilling wells in a shock-rotational manner in strong rocks. Drilling bit comprises a housing with a central and side channels for passage of the washing agent to the peripheral rock-breaking inserts installed in the housing, and cylindrical cutter teeth fixed in the advancing part of the housing. Two cylindrical cut teeth are installed symmetrically about the axis of the hull on one diametrical straight line. On the second diametrical straight line, perpendicular to the indicated diametrical straight line, in addition to the axis of the body, an additional cylindrical core shank is installed, the protruding part of which over the leading part of the body is smaller in height than the protruding part above the leading part of the body in height at each of said cylindrical cut teeth. Mouth of at least one lateral channel is formed with an outlet to the leading part of the housing in the annular movement zone of said two cylindrical cutting teeth.

EFFECT: technical result consists in increasing the diameter of the embankment, improving bottom centering to reduce the curvature of the well, improving cleaning and cooling the leading part of the body with a washing agent.

1 cl, 3 dwg