DRILLING BIT WITH PDC CUTTERS Russian patent published in 2020 - IPC E21B10/43 E21B10/55 

FIELD: soil or rock drilling; mining.

SUBSTANCE: invention relates to drilling equipment, namely to drill bits of cutting type with PDC cutters, and can be used in drilling wells. Drill bit with PDC cutters comprises steel or female body with connecting thread for connection with drill string, blades protruding above its end surface, flushing sealed units with wear-resistant nozzles in spaces between blades, radial-circular rims of PDC cutters with diamond rock-destructing plates, cutting planes of which are located along lines connecting centres and diameters on planes of plates with axis of bit. Additionally, along the circular trajectory on the radial-ring ring behind the above cutter with diamond rock destruction plate, cutting plane of which is located along line connecting centre and diameter on plane of plate with axis of bit, follows cutter with diamond rock-destructing plate of same diameter, plane of cutting surface of which is unfolded relative to projection on plane of face of line passing through centre on plane of plate and axis of bit at acute angle within range from 5 to 35°, with alternating said inclination angle clockwise and counterclockwise thereon on adjacent successive cutter with diamond rock-destructing plate of same diameter when cutters are installed along annular trajectory on radial-annular crowns.

EFFECT: technical result consists in improvement of mechanical drilling speed.

1 cl, 9 dwg