FIELD: oil and gas industry.
SUBSTANCE: device includes a sucker-rod pump unit and liner of pipes below the productive interval. The liner part covering the productive interval is assembled of resilient elements with flexural stiffness less than flexural stiffness of the pipes placed above it.
EFFECT: device is distinguished by a simple design and operational reliability; it allows essential increase in efficiency of the producing wells by generation and transfer of flexure oscillations to the productive stratum interval.
4 cl, 2 dwg, 2 ex, 1 tbl
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