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

1986-05-06

1987-06-02

Vrablik, John J.

Rotary expansible chamber devices

Methods

418 48, 418181, 417365, 417410, 415104, F04C 2107, F04C 1500, F04B 4714

Patent

active

046699619

ABSTRACT:
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.

REFERENCES:
patent: 2692507 (1954-10-01), Steensen
patent: 2737119 (1956-03-01), Hill
patent: 3011445 (1961-12-01), Bourke
patent: 3143078 (1964-08-01), Gaslow et al.
patent: 3171630 (1965-03-01), Harney et al.
patent: 3286642 (1966-11-01), Lindberg
patent: 3583205 (1971-06-01), Erle
patent: 3677665 (1972-07-01), Corkill
patent: 4080115 (1978-03-01), Sims et al.
patent: 4227865 (1980-10-01), Erickson et al.

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