WELL SELF-CLEANING FILTER OF INSERT PUMP Russian patent published in 2025 - IPC E21B43/08 

FIELD: obtaining oil from wells.

SUBSTANCE: invention relates to oil industry, in particular to well filters for filtration of oil well products, and is intended for protection of inserted well sucker-rod pump against ingress of mechanical impurities. Device includes a pipe with perforations, which is interconnected in the upper part with the inlet of the pump lowered into the tubing string, and a lower plug in the form of a cone converging downwards. Elevator pipe string is equipped from below with branch pipe with upper inner stop and inner brushes installed uniformly along the perimeter. From below the cone is equipped with a spring centraliser for a tubing string and a branch pipe; an upper internal support of the branch pipe has a possibility of interaction with a pump. Perforated holes are made below internal brushes of the branch pipe with the possibility of interaction for cleaning with these brushes at movement up and down of the pipe with the pump relative to the branch pipe.

EFFECT: easy manufacture and reliable operation due to absence of internal movable elements.

1 cl, 1 dwg