ASSESSMENT OF THE WEAR INTENSITY OF IMPREGNATED DRILL BIT MATRICES

ABSTRACT The analytical research results presented in the article focus on studying the influence of design parameters of the impregnated drill bit matrix, drilling regime characteristics, and the granulometric composition of rock cuttings on the wear intensity of the rock-breaking tool. It has been established that the key factor determining the performance of an impregnated drill bit is the optimal selection of a matrix with appropriate wear resistance in combination with a suitable diamond grade, ensuring the bit's self-sharpening during the drilling process. Analysis shows that the time spent on tripping operations increases quadratically with the depth of the borehole. However, actual data indicate a more rapid-nearly cubic-increase in the duration of these operations. This can be explained by the fact that deeper formations typically consist of harder rock, penetration per run decreases due to reduced tool feeding accuracy, and lifting speed drops as the weight of the tool assembly increases. Calculations demonstrate that even doubling the mechanical drilling speed results in only a 10–30% increase in run-based drilling speed. Therefore, improving tripping operations and reducing time losses at this stage is a major reserve for enhancing overall drilling performance, significantly affecting the total time balance of well construction. A promising approach to increasing drilling efficiency in hard rock formations is the implementation of high-frequency hydraulic impact drilling using removable core barrels. Bench and field tests have confirmed the feasibility of employing hydraulic impact devices deployed within the drill string alongside the core barrel. Test results indicate a 25% increase in mechanical drilling speed and a 10% increase in penetration per cycle, confirming the high effectiveness of the proposed method.