FIELD: oil recovery industry; oil-well sucker-rod pumps. SUBSTANCE: oil-well sucker-rod pump contains plunger-cylinder pair with delivery and suction valves fitted in them respectively and filter connected with pump inlet; filter has inner pipe and upper and lower cylindrical reservoir connected to its housing; cavities of these reservoirs are insulated from cavity of filter by means of partitions. Bottom of lower cylindrical reservoir has hole which is closed by valve fitted in reservoir. Cavity of filter is brought in communication with cavity of upper reservoir and pump inlet by means of inner pipe. Perforations are provided in filter housing from upper section to section corresponding to lower section of inner pipe. EFFECT: enhanced reliability of pump operation due to protection of its inlet against penetration of resin-paraffin deposits in lowering it in well and mechanical impurities during light of liquid at simultaneous accumulation of resin-paraffin deposits and carrying of resin-paraffin deposits and mechanical impurities from well during scheduled underground repair of well.
