DRILL BIT Russian patent published in 2021 - IPC E21B10/12 E21B10/46 

FIELD: oil industry.

SUBSTANCE: invention relates to the field of creating a drilling rock cutting tool for rotary drilling of wells with coring. The drill bit includes a body with a matrix and rock-breaking elements mounted on axes fixed in the matrix in the form of an equilateral polygon with the possibility of rotation around its axis. PDC cutters are used as rock breaking elements. The axles are hollow, filled with grease and provided with holes for lubricating the cutter surface. The matrix on the side of the incisors is made with annular grooves. The cutters are made with stabilizing collars located coaxially with the annular grooves of the matrix. At the point of contact of the cutter with the rock, the matrix is made with an abrasive shoulder.

EFFECT: invention provides increased resource of rock cutting tools.

1 cl, 4 dwg