FIELD: oil and gas industry.
SUBSTANCE: group of inventions refers to oil extracting industry, particularly to systems of maintaining reservoir pressure. The essence of the invention by one of versions is as follows: the installation consists of production tubing, of a packer, and of an electro-immersed pump with electric engine, a cable and a case. According to the invention the case envelops only the electric engine and it is equipped with the cable sealing unit located in an input module of the pump and conjugated with under packer space via a tail piece. A reverse valve is installed at the output of the electro-immersed pump; the said pump communicates via the reverse valve with the production string made with apertures for water supply into annular space and an upper reservoir. Also a flow meter is assembled in the interval between the aperture and pump output. According to the second version an additional production string is installed inside the production string; the additional production string is made with nipple for movable connecting with a seat and for water supply via the string and two-channel coupling into annular space and an upper reservoir.
EFFECT: simplification of installation design and assembly and also prevention of a production string from corrosion effect of transferred water.
2 cl, 2 dwg
