DRILLING WATER-JET CONE ROCK BIT Russian patent published in 2015 - IPC E21B10/18 

FIELD: mining.

SUBSTANCE: drilling water-jet cone rock bit comprises a housing with a stepped centre channel and a nozzle placed in it with a sealing element and a stopper. The nozzle is equipped with a guide assembly for providing its axial movement without rotation, at that the nozzle is formed with a mating stepped outer surface, the upper part of which is placed in the cavity of the nipple part of the bit and is formed with the thread on the outer surface, and the stopper is made in the form of a turbine wheel connected with the upper part of the nozzle by the thread. The turbine wheel is equipped with blades creating a torque effect directed in the direction of tightening the screw pair: nozzle-turbine wheel.

EFFECT: improvement of efficiency of the bit operation, improvement of reliability of the washing unit.

4 cl, 4 dwg