COMPUTER SIMULATION OF PROCESSES AT WELL DRILLING
Relevance. The main drilling development direction is improving technical and economic indicators. The main direction is the new rock-cutting tools generation, which ensures the effective rock destruction. To improve the technical and economic drilling indicators it is necessary to study the processes occurring during well drilling. Often the processes are complex and need to be detailed. This applies to narrow, hard-to-reach places in the bottomhole zone. In some cases, experimental research methods are difficult, expensive, or completely unavailable. In addition, the main modern requirement for scientific research is an integrated approach. It consists in a comprehensive and simultaneous consideration of all processes occurring during well drilling. In this regard, a relevant method is the computer simulation. This method studying drilling accurately, visually and reliably. The aim of the research is the computer simulation o f the processes occurring during drilling. Objects: processes occurring during well drilling. Methods: simulation modeling, analytical studies, analysis. Results. The authors have identified the main drilling processes that need to be explored in the design and development of a new generation rock cutting tools. The paper considers the possibilities of computer modeling in study of drilling with diamond crowns. On the simplified model example for the interaction of rock cutting tools with rocks, software products are given. The results of their use are shown: the thickness of a rock layer removed by any diamond crowns, the tool location coordinates at any time, the heating temperature of the diamond single-layer crown, the distribution of mechanical stresses. The authors compared the modeling of the same drilling processes using different software products. The features, modeling accuracy of drilling processes are revealed. The computer simulation of drilling processes is grounded. The paper demonstrates the advantages of computer simulation over the experiment.