ARRANGEMENT FOR PRODUCTION OF OIL AND TREATMENT OF FACE ZONE OF WELL Russian patent published in 2001 - IPC

FIELD: oil industry, production of oil with simultaneous treatment of face zone of well. SUBSTANCE: arrangement has cylinder with plugged bottom part and intake holes in upper part. Plunger is put into cylinder for reciprocating motion. Extension piece with adapter coupling to accommodate tubing string is connected to cylinder. Length of plunger that has valves is not less than length of its stroke. Cylinder is provided with internal annular groove whose width is not less than diameter of intake holes at level of intake holes. From outside cylinder is fitted with filter composed of tubular shell with filtering member and radial holes which is placed concentrically with reference to cylinder. One end of shell is equipped with adapter coupling to accommodate tubing string, its other end is fitted with split plug set in circular space between filter shell and cylinder. EFFECT: increased operational reliability of down-hole equipment, improved efficiency of treatment of face zone of well. 3 dwg