PRODUCTION WELLS CLEANING SYSTEM WITH APPLICATION OF GRAVITY FILTER Russian patent published in 2020 - IPC E21B43/38 

FIELD: systems for cleaning production wells.

SUBSTANCE: invention relates to production wells cleaning systems using gravity filter. System for cleaning production wells using a gravity filter includes an accumulating container, a screw, a pump with an electric motor drive. At least one of pipes in lower part of casing string is perforated, gravity filter with screw installed inside it is fixed on faceplate, at joint of pipes of smaller and larger diameters of the casing string, on the side of the pipe of larger diameter. Container-accumulator is installed below the filter, and between the filter and the pump there is a disconnector-sealer, which consists of a washer and a branch pipe. Washer is installed inside pipe with provision of tightness of connection, branch pipe is installed inside washer with provision of tightness of connection.

EFFECT: technical result consists in possibility of operation in aggressive media, simplification of installation of system, possibility of self-contained, independent of submersible pumping unit, mounting, possibility of sufficiently easy extraction and cleaning of system, durability of filter.

5 cl, 1 dwg