UNIT FOR SIMULTANEOUS SEPARATE OPERATION OF TWO FORMATIONS Russian patent published in 2020 - IPC E21B43/14 

FIELD: oil industry.

SUBSTANCE: invention relates to downhole pumping units. Plant includes a sucker-rod pump with a plunger and a cylinder, with a side hole communicated with an additional suction valve, separation piston and extra pressure valve. Separating piston is made with through longitudinal channel communicating over- and under-piston spaces, in which additional valve is arranged, and on lower end of plunger there is a pusher for interaction with said valve. Additional valve is made with ball spring-loaded upwards to the seat, or the ball presses to the saddle the load through the lever mechanism, or additional valve is made slide valve, also using spring or load with lever mechanism.

EFFECT: technical result consists in simplification of design, as well as reduction of transverse dimensions, which makes it possible to use plant in wells of small diameter.

4 cl, 6 dwg