FIELD: well testing. SUBSTANCE: method includes placing the pumping unit in steady-state operating conditions with withdrawal of pumped out fluid, determination of efficiency of surface and downhole equipment, construction of diagrams of active power consumed by drive electric motors, and diagrams of wellhead pressure at two different pressures at wellhead during upward stroke of polished rod. Diagrams are used to determine average value of active power for pumping cycle and pressure loss in pump valves. Pump suction pressure is calculated by formula and resulted values are indicative about possibility of further operation of well. EFFECT: higher efficiency. 2 dwg
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