Experimental Research on the Impregnated Diamond Bit Wear Model

The low rate of penetration (ROP) and severe wear of polycrystalline diamond compact (PDC) bits are one of the main problems restricting the exploration of deep oil and gas resources when drilling strongly abrasive formations. As a rock-breaking tool that breaks rocks in the way of diamond exposure, the impregnated diamond bit has the characteristics of high stability, long service life and high drilling speed, which are considered to improve the drilling efficiency of strong abrasive formations. one of the effective ways. However, the drilling parameters and rock abrasiveness of the impregnated drill bit have a very significant impact on the wear rate of the impregnated diamond bit. If the drilling parameters are not designed properly, the bit will be severely worn and the service life will be too low. At the same time, there is a lack of research on the wear equation of diamond-impregnated drill bits, which cannot predict the wear rate of the drill bit and the life of the drill bit well. Therefore, this paper analyzes and summarizes the experimental data of the influence law of drilling parameters and rock abrasiveness coefficient on the wear of impregnated diamond bits, and establishes a formula based on the quantitative relationship between wear rate and WOB per unit area, rotary speed and rock abrasiveness. The impregnated diamond bit wear model provides a theoretical basis for the life prediction of the impregnated diamond bit in field drilling operation.