RESEARCH OF THE STRESS-DEFORMATION STATE OF THE ROD OF A DOUBLE-ACTION DRILL PUMP

Abstract

Currently, most drilling rigs used in Ukraine are physically and morally obsolete. Their modernization as a whole should begin with individual components, which include the equipment of the circulation system. In this case, it is necessary to adhere to the main directions of technical progress in oilfield engineering: increasing reliability, technical and economic indicators. One of the important tasks facing the industry is the maximum unification and typification of components and parts of machines and equipment that are subject to rapid wear. Examples of such components are the cylinder-piston pair and valve assemblies of drilling pumps. It should be noted that with increasing drilling depth, the power of drilling pumps also increases significantly. From known sources of information it is known that on the basis of experience, scientific research and development works, as well as the latest achievements in oil engineering and related fields of science and technology, today drilling pumps are continuously improved, their reliability and durability are increased, their mass is reduced, material and labor costs for their manufacture, operation and repair are reduced. This determines a wide range of drilling pump models and their modifications. The purpose of the work is to analyze the stress-strain state of the drilling pump rod using simulation modeling based on the finite element method. Based on the results of the analysis of the stress-strain state of the UNB-600 drilling pump rod, stresses, safety factors, and total displacements were determined. Also, the rod stability under compression was simulated and the safety factors were determined. The inertial characteristics of the pump rod model were established and its natural frequencies were determined.