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Another research project of the University of Petroleum, "Study on Separation of Liquid from Sand under Pumping," recently passed the appraisal of experts organized by Shandong Science and Technology Department. Accreditation Committee agreed that the research reached the international advanced level. The research result was presided over by Professor Li Zhao Min, doctoral supervisor of the School of Petroleum Engineering. The researchers used the large-scale fluid mechanics calculation software to simulate the flow field of the liquid-sand separator under pump, systematically studied the flow field characteristics, and optimized the structural parameters of the separator. Flow separator optimization software. According to the basic principle analysis and numerical simulation results of hydrocyclone, the researcher developed a liquid sand separator for pumping under different oil wells, which has the characteristics of reasonable structure, low investment and maintenance cost and less energy consumption. The field application of the research results shows that the pump liquid sand separator can effectively reduce the sand content in the pump liquid, thereby reducing the wear on the pumping equipment, increasing pump efficiency, reducing the number of operations, effectively preventing the phenomenon of sand card pump, Prolong the pump cycle, has made significant economic and social benefits.