FIELD: oil production, use of wells with metered feed of reagents to pump inlet. SUBSTANCE: pump installation has dynamic action pump, chemical reagent container of " tube in tube " type, jet device operated as metering device. Jet device and container are positioned under pump. They are fitted with non-return valves of ball-spring " type. Valve for inlet of internal tube has stiffer spring or lighter ball as compared with valve for inlet of jet device. Produced fluid is directed to nozzle of jet device. Non-return valve of it opens. Valve at inlet of container also opens. Chemical reagent will be driven by fluid from beneath. Metering is conducted by selection of diameters of nozzle and neck. EFFECT: increased operational efficiency of installation while pumps of dynamic action are used for oil production. 1 cl, 1 dwg
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