DOWNHOLE FILTER

摘要

The invention relates to downhole filters usable in oil production for preventing mechanical impurities from being removed along with extractable stratal fluid. The technical result consists in increasing the service life and reducing the labour intensity of manufacturing a downhole filter. The downhole filter comprises a perforated body (1) and thin polymeric discs (4) with discrete particles which are attached to one of the bases thereof and form labyrinthiform channels (8) between one another. The discrete particles are in the form of polymeric pins (7) of identical height and oriented perpendicularly to the plane of the base.