FIELD: oil producing industry. SUBSTANCE: proposed oil-well sucker-rod pump contains plunger with valve whose length is not less than its travel. Cylinder is provided with holes in upper part located higher than level of plunger set on its lower stop. In process of operation, when withdrawing oil from lens zones of oil bearing bed, and formation pressure reduced to tolerable value, plunger of pump is set on its lower stop. Compensating liquid is pumped into lens zones of oil bearing bed through holes, thus formed, which communicate with tube space in upper part of cylinder. EFFECT: increased capacity, simplified processes at development of lens zones, cut down cost of oil production. 1 dwg
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