FIELD: oil extraction industry; borehole sucker-rod pump units. SUBSTANCE: pump is provided with movement transducer of sucker-rod string for functioning within working travel of delivery valve. The latter is joined with sucker rod string on one end and on other, with shock strut piston isolated from chemically active medium. Intake duct is disposed in cylinder at level ensuring liquid drain from pump-and-compressor tubes as soon as piston sets on bottom stop. Delivery valve is controlled by special transducer through shock mount to ensure trouble-free operation of pump when extracting high-wax-content oil from heavily inclined boreholes. EFFECT: enhanced reliability. 1 cl, 6 dwg
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