Purpose. Justification of magnetic field application in order to prevent formation of asphalt-resin-paraffin deposits (ARPD) in oil and gas equipment, and consider some current views on the state of ARPD problem in oilfield equipment and possible methods for its solution using magnetic treatment.Methods. Analysis and generalization of the research results of production fluid magnetic treatment using COMSOL Multiphysics software.Findings. The technology of magnetic fields application in prevention of asphalt-resin-paraffin deposits is introduced in the article. The obtained results of production fluid magnetic treatment make it possible to use it in oil wells equipped with pumping units, as well as in free flow production method or in wells operated by electric-centrifugal pump, and in oil pipelines.Originality. The use of high energy magnets based on rare earth materials can reduce asphalt-resin-paraffin deposits in oil equipment. Practical implications.The proposed magnetic treatment creates opportunities for field exploitation at the later stages of development which are characterized by a high content of asphaltenes, resins and paraffins. The results of production fluid magnetic treatment have proved the efficiency of this technology, which has doubled a turnaround time.

Analysis of literature sources, as well as practical data indicate that the existing scientific, technical and technological developments to ensure reliable corrosion-mechanical resistance and durability of oil and gas pipelines and other shell metal structures of critical use and subordinate to the State Service for Mining Supervision and Industrial Safety of Ukraine largely find contradictions and uncertainty; there are no quantitatively substantiated recommendations for practical application in order to ensure corrosion and mechanical resistance of pipelines operating in technologically aggressive environments under alternating temperature and barometric conditions and loads; there is a need for a systematic study of the causes, conditions and mechanisms of corrosion and mechanical damage of long-term equipment, which will significantly increase the operational reliability of industrial equipment. Experimental studies have established the causes and substantiated the mechanisms of metal softening with increasing service life (from 0 to 25 years) that leads to its degradation, especially during long-term operation in corrosive environments. A method for forecasting the residual working (accident-free) life of pipeline metal structures has been developed, which makes it possible to purposefully regulate their operational condition. This allows the timely use of technical, design and technological measures to improve the performance of such structures. Numerous and diverse results of experimental tests of metal samples for various purposes have been obtained, which provide an opportunity to create a base for comparative analysis of steels in many parameters of crack resistance, which will become a reliable basis for scientific and practical substantiation of the equivalent replacement of some steel grades with other grades, taking into account technological loads, corrosive environments and others.

Purpose. The aim is to analyze the problem of preventing the asphalt-resin-paraffin deposits (ARPD) in the oil industry equipment and to justify application of paraffin control methods; to review modern approaches to ARPD problem and possible methods of its solution; to analyze existing methods of hydrocarbons 'treatment by magnetic field.Methods. Investigations showed that application of magnetic anti-paraffin device (MAPD) makes it possible (during 24-hour operation of the oil well) to double the time between overhauls of oil wells equipped with sucker rod pump installations.Findings. The results obtained due to MAPD application in oil wells equipped with sucker rod pumps give an opportunity to use it in oilfield practice employing free-flow production method or in wells serviced by centrifugal pumps and in oil pipe lines.Originality. Application of up-to-date magnets with poles from 60 to160 kA/m enables to decrease ARPD in oil equipment.Practical implications. The results of MAPD implementation at Boryslav field, in particular in wells No 1343, 797, 948 proved the efficiency of the device application and doubled the overhaul period. Magnetic field effect on hydrocarbons is analyzed in the article.

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During the exploitation of equipment and piping systems of sulfuric acid, shale, metallurgical, mining, energy and other industries, the metal of a number of structures directly contacts with sulfur-containing agents at high temperatures. This resultsin intense corrosion, loosening and saturation of the surface layer of metal with sulfur (elementalor in the form of variouscompounds, including sulfides, iron, oxides) with a concentration of up to 0.6%. Repair welding of such metal at its partialreplacement is connected with the big labor costs caused by necessity of mechanical removal of a surface layer, as withoutthis operation in weld metal by standard electrodes hot cracks, pores and notfusion are formed.