ДОСЛІДЖЕННЯ ХАРАКТЕРИСТИК МАГНІТНИХ СИСТЕМ МЕТАЛОУЛОВЛЮВАЧІВ

Abstract

During the construction of oil and gas wells, metal debris accumulates at the bottomholes. It is not completely removed to the surface by the flow of drilling fluid but remains throughout the drilling process, causing accelerated wear of rock-destroying tools. To reduce accident rates and improve the technical and economic performance of drilling, it is necessary to clean the bottomhole from cuttings and metal particles, in particular by using fishing magnets. An analysis of the operating conditions of fishing tools has shown that their performance is significantly influenced by design factors, including the dimensions of the magnetic system elements and their relative arrangement. The aim of the research is to study the influence of design characteristics on the efficiency of fishing magnets. The magnetic system was developed, taking into account the operating conditions of the tools in the well. To determine the optimal dimensions of permanent magnets and magnetic cores, theoretical studies of the systems’ magnetic characteristics were conducted. Three-dimensional models were developed, and calculations were performed in the ANSYS Electronics Desktop environment. As a result, the distribution of magnetic flux density on the surface and at the working gap of magnetic systems with different magnet lengths was obtained. It was found that varying the length of the permanent magnet from 6 mm to 10 mm has little effect on the magnetic flux density distribution, maintaining a similar field pattern and magnitude. Considering the efficient utilization of magnetic field energy, the most optimal configuration comprises a 6 mm magnet length and a 20 mm magnetic core length, with the cores operating close to the saturation limit of the soft magnetic material.