Designing a High Performance Rock Cutting Tool

Abstract

The design parameters of a rock cutting tool reinforced with diamond hard-alloy plates of PDC type are described in the article. A core bit with mechanical fastening PDC is described. The description of the bit work on the drift is given. The economic efficiency of the bit is achieved due to the fact that worn PDC plates are easily replaced with new ones, and multidirectional water courses allow creating an efficient turbulent flow on the drift, which increases the mechanical drilling speed. A stabilizing drill bit, reinforced with PDC, having calibrated PDC plates located along the helix, is described, which gives it additional roll stability at the drift. A description of a stabilizing two-level bit of a cutting type is given. On the axis of the bit there are long lines having a different frequency and counter-rotation. The design of the bit helps to reduce the torque on the drilling structure, which prevents the occurrence of torsional vibrations that cause PDC breakdown. A description of the stabilizing cutting-shearing type two-level bit with a permanent magnet mounted inside the upper drill string is given. Magnetization helps to improve the quality of the drilling agent. The proposed rock cutting tool allows to increase the mechanical drilling speed by 1.8 times for the core bit and 2.1 times for the bit.