PLANT FOR SIMULTANEOUS SEPARATE OPERATION OF TWO FORMATIONS Russian patent published in 2016 - IPC E21B43/14 F04B47/02 

FIELD: pumps.

SUBSTANCE: invention relates to well pumping assemblies and can be applied for simultaneous and separate operation of two formations. Installation includes production tubing, upper and lower Packers mounted above respective reservoirs, stem with channels, and rod pump with additional suction valve, communicated with outlet hole in cylinder wall, hollow case with side hole, communicated with annular space, main suction valve in lower part, and separating piston placed below hole for additional suction valve in cylinder with possibility of restricted longitudinal movement downwards into body cavity and upwards under action of plunger, extra pressure valve passing from housing cavity through side hole in annular space. Main and additional suction valves are communicated through channels arranged in shank, with one of formations not communicated with other channel, while plunger cavity communicates with tubing. Additional suction valve is connected with hole in cylinder through annular space formed by jacket, surrounding lower part of cylinder with a hole and body, which is equipped at bottom, below side hole, with additional cylinder. Dividing piston is equipped with additional piston for additional cylinder, with and inner channel, communicating under-piston space of additional cylinder with inner cavity of housing. Additional pressure valve is installed in inner channel of dividing piston.

EFFECT: technical result consists in improving efficiency of dual operation of small diameter wells.

1 cl, 2 dwg