DOWNHOLE PUMP WITH INTAKE FILTER Russian patent published in 2019 - IPC F04B47/00 F04B53/20 

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to submersible well pumps with intake filter and can be used in oil industry. Pump comprises cylindrical housing connected with filter. Filter is made in the form of a perforated cylindrical shank with cells telescopically connected to the housing with the possibility of the axial movement limited by a stop. Filter is equipped with a cleaning tool made in the form of a scraper covering the shank. Scraper is made in the form of a perforated cylinder with formation of alternating holes and protrusions matched to shank cells. Scraper is equipped at ends responding to pump housing and shank, upper and lower rings correspondingly to housing and shank. Upper ring is rigidly connected to the pump housing.

EFFECT: higher reliability.

3 cl, 4 dwg