WATER WELL PUMPING UNIT Russian patent published in 1999 - IPC

FIELD: water wells. SUBSTANCE: pumping unit has tubing string, ejector and centrifugal pumps, operation control device and dynamic level metering device. Ejector pump has radial intake channels. Control device is made in form of ring float and body with radial intake channels connected with float by tie-rods and installed for movement of ejector pump. It has ejector pump channel overlapping section and stops of positions with open and overlapped channels. EFFECT: provision of operation of pumping unit at optimum conditions with minimum energy losses. 5 cl, 1 dwg