ELECTRICAL CENTRIFUGAL-PUMP PLANT Russian patent published in 1999 - IPC

FIELD: mining and petroleum industry engineering, in particular, pumping plants with engine-pump sets located at a high depth for lifting liquid from wells, applicable for production of liquid mineral resources. SUBSTANCE: the plant is furnished with a rod string. Pressing members are made in the form of a hydraulic packer. The packer has a releasable hose, central channel, check valves and a coupling shaft. The packer is located between the electric motor and pump. The electric motor is attached to the lower end of the rod stringer in the overpacker space. The cavity of the releasable hose communicates with the pump delivery channels through the check valve. The coupling shaft is located in the packer central channel, and it is open through the annular check valve to the cavity of the service stringer in the space over the packer. The channels connecting the central channel to the delivery channels of the pump are covered by a piston fastened by pins in shear. EFFECT: reduced specific quantity of metal per plant and probability of cable damage at a descent to the well, reduced cable length due to location of the motor over the pump, enhanced degree of petroleum recovery of the pool due to isolation of the pump from the surface pool space, reduced probability of failures due to dampening of vibrations of suspension by the flexible-elastic packer. 1 dwg