FIELD: engines and pumps.
SUBSTANCE: oil well pumping unit comprises an electric motor, a hydraulic protection, pump sections, an input module with receiving holes, a jacket and a device for particle separation. A jacket covers the bottom of the lower pump section and the input module, forming a circular cavity with it. The device for particle separation is made in the form of a spiral-like blade installed in the circular cavity and ending below the receiving holes. The jacket is equipped with input holes at the top and a sealing ring arranged at its end below receiving holes. Axial tubes are installed into the sealing ring, which serve to remove particles from the circular cavity into the well and ending below the level of the electric motor.
EFFECT: increased duration of well pump unit operation with high content of mechanical admixtures in a pumped liquid, simplification of its design and improved manufacturability of production.
1 dwg
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