Oil well pump with radially expandable interlocking seal ring

Details Oil well pump with radially expandable interlocking seal ring Oil well pump with radially expandable interlocking seal ring

1993-09-03

1994-12-13

Bertsch, Richard A.

Pumps

Expansible chamber type

Valved piston

4175552, 417569, 92185, 92257, 277221, F04B 2100, F01B 3100

Patent

active

053724887

ABSTRACT:
Improvements in a downhole submerged pump assembly having a plunger formed of a cast or machined cylindrical member includes seal ring grooves capable of receiving flat metallic seal rings formed of a plurality of segments which are interlocked in a manner wherein the segments can expand during the upstroke of the pump movement and retract during the downstroke.

REFERENCES:
patent: 29621 (1860-08-01), Robinson et al.
patent: 255522 (1882-03-01), Lewis
patent: 1390577 (1921-09-01), Nagy
patent: 1956868 (1934-05-01), Lemmon
patent: 2221775 (1940-11-01), Boynton
patent: 2392182 (1946-01-01), Payne
patent: 2591230 (1952-04-01), Bertrand
patent: 2674956 (1954-04-01), Hilton
patent: 4395204 (1983-07-01), Turner
patent: 4762476 (1988-08-01), Turner
patent: 4983105 (1991-01-01), Mims, Sr.

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