FIELD: oil and gas industry.
SUBSTANCE: well pump includes cylinder, plunger, self-aligning suction and discharge valves and rod. Rod is hollow and connected to a plunger with one end. The other end of the rod is connected to a self-aligning discharge valve removed from the plunger and is enclosed in a larger-diameter self-contained casing located in the pump-compressor pipes.
EFFECT: efficiency of the rod well pump in marginal horizontal wells with high-viscosity oil is increased due to an increase in crude oil delivery rate.
2 dwg
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