Evaluation of efficiency of destruction of solid rocks by drilling crowns, equipped with synthetic diamonds and insertions DPCM+

Abstract

The purpose of this work was to evaluate the effectiveness of fracture of solid rock by drill bits with a diamond-containing combined matrix, the volume layer of which is equipped with synthetic diamonds and inserts from DPCM+, as well as the effect of equipping the combined matrix on the energy intensity of the rock destruction process by studying the size of the sludge formed during drilling. The use of rock-cutting inserts from DPCM+ in drill bits with a combined diamond-containing matrix results in an increase in the roughness of the microfilm of the bottomhole surface from 1,26 to 1,46, reducing the wear of the combined matrix of the crown by a factor of 2,1 due to the high wear resistance of the DPCM+ material and an increase in the average mechanical drilling speed to 1,25. Due to the high wear resistance of the DPCM+ material, the protrusion of the rock insertion insert over the body of the diamond-containing matrix is provided, which allows to maintain during the drilling the corresponding outflow of diamonds and contributing to the high efficiency of the crown as a whole with low energy consumption of the drilling process