PULSATING VALVE-TYPE DOWNHOLE PUMP Russian patent published in 2014 - IPC G21F9/28 

FIELD: engines and pumps.

SUBSTANCE: proposed pump comprises housing with intake ball valve, pulse duct, pressure pipe with discharge ball valve, air pressure control valve and control system. Housing is communicated with lower nozzles via pipe and lower nozzle chamber accommodating the shaft with cone connected thereto over small diameter. Cone is connected over large diameter to the shaft hollow part with nozzles. Flange is made at the cone large diameter to interact with chamber seat at the shaft top position. Said shaft is engaged via moving bearing assembly and gear with nozzle turn sand penetration drives.

EFFECT: control over flow rates of fluid fed simultaneously into lower nozzle chamber and pressure line.

3 cl, 5 dwg