METHOD TO ACT ON WELL CRITICAL ZONE Russian patent published in 1996 - IPC

FIELD: oil production industry, method is used in oil wells operation to intensify oil inflow in well during its development and operation. SUBSTANCE: method of action on critical zone of oil well provides for level of liquid pushing away by gas pressure in ring-shaped space between operational and lifting strings with simultaneous liquid withdrawal ин deep well pump landed in well by lift string. Deep well pump with shank. Liquid is withdrawn till mark below inlet of dep well pump. Then well discharge through ring-shaped space is exercised. Gas is pumped in by compressor. Withdrawal liquid level is exercised by gas pressure separated from well liquid by its collection in the ring-shaped space. Pump shank has reverse valve. EFFECT: method allows to intensify oil inflow in well during its development and operation. 3 cl, 1 dwg