FIELD: oil producing industry.
SUBSTANCE: proposed oil-well plunger pump contains cylinder stopped from the bottom with suction and delivery valves arranged at side, and plunger. Plunger is provided with ring grooves. Underplunger space communicates with overplunger space by suction and delivery channels through additional valve arranged between suction and delivery valves. Additional valve is formed by interaction of ring grooves of plunger and side channels of cylinder formed by suction and delivery channels. Suction and delivery valves are formed by interaction of side holes of cylinder with plunger. Suction and delivery valves are made for overlapping in upper and lower top and bottom dead centers of plunger stroke. Invention provides transfer of oil well products under different operating conditions, irrespective to viscosity of liquid and gas content in liquid.
EFFECT: enlarged sphere of application, possibility of operation in inclined and horizontal wells.
4 dwg
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