HYDRODYNAMIC MODULAR UNIT FOR PREVENTING ASPHALT-RESIN-PARAFFIN DEPOSITS
Bashmur K.A., Petrovsky E.A., Geraschenko Yu.A., Makolov V.A., Shadchina Yu.N.
DOI https://doi.org/10.25689/NP.2019.3.129-140
Abstract
In recent years, formation of asphalt-resin-paraffin deposits on the inner surface of tubing strings has been one of the main complicating factors in oil production. Consequently, it is necessary to move in the direction of improved methods directed at eliminating and preventing the formation of asphalt-resin-paraffin deposits. The application of the hydrodynamic method to prevent and remove borehole deposits from the inner walls of tubing has become one of the promising methods. The study identified the problem concerning the formation of asphalt-resin-paraffin deposits in downhole equipment which leads to a number of negative consequences. Methods for deposits preventing and removing already formed deposits were considered and analyzed. The main disadvantages of existing methods were identified. The improved hydrodynamic method is proposed which is free of the problem of blocking the flow section of the tubing string. The method involves special equipment including a direct-flow swirler. The downhole process module with fluid direct-flow swirler has been developed. When the fluid flow passes through the direct-flow swirler it is converted into a pulsating turbulent flow by pressure fluctuations in the peripheral zone, flow velocities redistribution takes place. This leads to effects on the walls of the tubing. Simulation flow modeling in the direct-flow swirler was carried out using the SolidWorks Flow Simulation software. It was found out that increasing the temperature of the oil and gas flow has a positive effect on preventing the deposits formation on equipment walls. The graphs of swirling and flow temperature were analyzed. The authors of the article revealed that an increase in the intensity of the flow swirling intensifies heat release in the system. As a result, the simulation proved the effectiveness of the design and revealed the right cross-section of the swirler.
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Authors
Petrovsky E.A., Dr.Sc, Professor, Head of Department of Process machines and facilities for oil and gas sector, Oil and Gas Institute of Siberian Federal University, Krasnoyarsk, Russian Federation E-mail: petrovsky_quality@mail.ru
Geraschenko Yu.A., Master Student, Department of Process machines and facilities for oil and gas sector, Oil and Gas Institute of Siberian Federal University, Krasnoyarsk, Russian Federation E-mail: geraschenko.iul@yandex.ru
Makolov V.A., Master Student, Department of Process machines and facilities for oil and gas sector, Oil and Gas Institute of Siberian Federal University, Krasnoyarsk, Russian Federation E-mail: vadik0597@yandex.ru
Shadchina Yu.N., Master Student, Department of Process machines and facilities for oil and gas sector, Oil and Gas Institute of Siberian Federal University, Krasnoyarsk, Russian Federation E-mail: ulia.sh72@yandex.ru
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