SELF-REGENERATING DOWNHOLE OIL GAS-SAND ANCHOR-FILTER OF CONTINUOUS ACTION Russian patent published in 2017 - IPC E21B43/08 

FIELD: mining.

SUBSTANCE: device comprises a perforated concentrically arranged hollow body, a central tube with openings at the lower end of input connections for the cleaning liquid, the casing at both its ends sealingly attached to the housing, filter elements, with a nozzle socket mounted on the centralizers opposite openings in the housing. Outside the perforated hollow cylindrical body positioned concentrically hollow fairing secured to the edges of the range-centralizers nozzles to enter the fluid being treated with a gap relative to the end face of the casing. The funnel sealed to the perforated body. Fastening performed along the outside perimeter of the socket and is located at the edge from the nozzle openings.

EFFECT: improved quality and reliability and output filtering solids from the filter ensures the separation of associated gas at the inlet of the filter, preventing clogging of the filter elements, making the design of the filter bandwidth is maintained continuously.

3 dwg