FIELD: oil production industry. SUBSTANCE: device has deep-well pump, container for reagent located in annular space. Proportioning unit which is together with well is positioned under pump. Proportioning unit is connected with container by pipe. Pipe passes through packer. Oil comes through openings in proportioning unit. Dose of reagent flows through valve of proportioning unit from container via pipe. EFFECT: simplified design, enhanced operational reliability and prolonged operation period between repairs of wells. 1 dwg
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