FIELD: engines and pumps.
SUBSTANCE: invention relates to pump engineering and can be used in borehole pumps designed to extract oil, water and other fluids from wells. Proposed plant comprises plunger pump with plunger reciprocated by elastic strain of hollow rod with filler, upper part of the latter being secured at wellhead. Cylinder is secured by parker at casing string. Said filler is composed of a weight suspended from the rope while plunger reciprocation is caused by weight rod up-and-down stroke.
EFFECT: higher head and efficiency at notable content of gas in borehole fluid.
3 dwg
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