IMMERSED PUMP-EJECTOR SYSTEM FOR EXTRACTING OIL Russian patent published in 2007 - IPC E21B43/00 F04F5/54 

FIELD: oil industry, possible use during pump-ejector extraction of oil from wells under complicated conditions.

SUBSTANCE: device contains immersed pumping plant lowered into well on tubing pipes, planting saddle, and also stream apparatus and shell, made in form of modules, lowered into well and extracted from it by means of cable equipment. Stream apparatus module is provided with reverse valve mounted below nozzle, while by means of a system of overflow valves, made in module of stream apparatus and planting saddle, space below reverse valve is connected to annulus space of well, space above check valve is connected to receiving chamber of stream apparatus, and space below nozzle is connected to force line of immersed pumping plant, while stream apparatus and shell are provided with collets for holding in planting saddle.

EFFECT: increased reliability and expanded area of possible use of pump-ejector extraction of oil from wells by means of completion of wells with stream apparatus mounted in well and possible positioning of stream apparatus at various depths depending on productiveness of well.

3 cl, 5 dwg