SEPARATOR FOR SUBMERSIBLE PUMPS IN WELLS Russian patent published in 2006 - IPC E21B43/38 

FIELD: mining, particularly to prevent clogging and sticking of executive mechanisms (shafts) of electric pumps in wells after hydraulic formation fracturing and sandy wells during pump operation.

SUBSTANCE: device comprises body, filtering net for fluid passage through the net. Separation drums adapted to divide fluid flow by density, as well as three-chamber unit to divide fluid into gas, liquid and mixture including liquid and mechanical injuries, and liquid and gas flow alternation stage are installed in submersed engine shaft. Device also has the first dispersion means to mix gas and mechanical injuries with liquid and unit to discharge mixture of gas with mechanical injuries. Above unit comprises bypass pipe, which bypasses centrifugal pump inlet and extends to outlet thereof. The device also has the second dispersion means to mix cleaned liquid with residual free gas and to supply the mixture to centrifugal pump inlet. Device includes pumping-and-injection system to create vacuum in bypass pipe, which provides flow of mixture including gas and mechanical injures and to merge above mixture flow with flow passing from centrifugal pump in flow string at centrifugal pipe outlet.

EFFECT: increased efficiency of clogging prevention, decreased wear, damage and sticking of executive mechanisms.

2 dwg