WELL 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, and is intended for protection of insert pumps against ingress of mechanical impurities. Device includes a pipe with perforated holes, which is connected to the pump inlet in the upper part, and a lower plug in the form of a cone converging from top to bottom. Filter is equipped with an external branch pipe with internal brushes installed evenly along the perimeter, and a packer pre-installed above the productive formation with fixation relative to the wellbore. From below the cone is equipped with a spring centralizer for the external branch pipe, and the perforation holes of the pipe are made with possibility of installation in the working position in the interval of internal brushes of the branch pipe and interaction for cleaning with these brushes at pressure difference during operation of the pump, which leads to reduction and elongation of the pipe.

EFFECT: simplicity of manufacture, reliability in operation of the structure due to absence of internal movable elements.

1 cl, 1 dwg