CONTROLLED SUBMERSIBLE ELECTRIC CENTRIFUGAL PUMPING UNIT Russian patent published in 2002 - IPC

FIELD: oil producing industry. SUBSTANCE: invention can be used in drives of submersible electric centrifugal pumps. proposed controlled pumping unit has submersible electric centrifugal pump, submersible electric motor and control device is form of differential mechanism. One of central wheels of mechanism is connected with shaft of submersible electric motor, and second central wheel is connected with submersible electric centrifugal pump. Planet pinion carrier of differential mechanical is connected through step up reduction gear with shaft of hydraulic gear pump. Inlet branch pipe of hear pump is connected with inner space of control device oil-filled housing, and outlet branch pipe, with crack-opened valve. Turnable spring-loaded blades placed in flow of well fluid are connected to valve. EFFECT: simplified design, improved reliability of unit owing to provision of mechanical control of electric centrifugal pump in operation. 1 dwg