Thrust balancing device for a progressing cavity pump

Details Thrust balancing device for a progressing cavity pump Thrust balancing device for a progressing cavity pump

F - Mech Eng,Light,Heat,Weapons

04

D

103/18

F04D 3/02 (2006.01) F04C 15/00 (2006.01)

Patent

CA 1245101

ABSTRACT OF THE DISCLOSURE A thrust reducing apparatus for a progressing cavity pump used in a well and driven by a submersible pump motor. A piston is mounted to the top of the rotor and located in a bore between the stator and the tubing which extends to the surface. A bypass passage enables fluid discharged from the pump to flow past the bore and the piston. An annulus passage extends into the bore above the piston for communicating fluid pressure in the annulus to the top of the piston. The lower side of the piston is exposed to discharge fluid pressure from the pump, resulting in a net upward force on the piston. The piston pulls upwardly on the rotor to reduce the downward thrust on the rotor.

528824

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