Pump plunger

Details Pump plunger Pump plunger

1974-11-04

1976-04-27

Freeh, William L.

Pumps

Expansible chamber type

Valved piston

92182, F04B 2104, F01B 3100

Patent

active

039531554

ABSTRACT:
A plunger for a downhole pump having a hollow mandrel with a concentrically arranged resilient cylinder thereabout, with an annular chamber formed between the mandrel and the cylinder. The annular chamber is flow connected to the interior of the hollow mandrel so that pressure which is effected within the hollow mandrel also is effected within the annular chamber causing the resilient cylinder to expand radially outwardly into engagement with the interior surface of the working barrel, thereby more efficiently sealing the plunger to the working barrel.

REFERENCES:
patent: 1019371 (1912-03-01), Schneider
patent: 1636433 (1927-07-01), Penrod
patent: 1769820 (1930-07-01), Baird
patent: 1938383 (1933-12-01), Hair
patent: 2224916 (1940-12-01), McFarlane
patent: 2702511 (1955-02-01), McConnohie
patent: 2994279 (1961-08-01), McGowen
patent: 3565446 (1971-02-01), Nyberg
patent: 3603215 (1971-09-01), Leschism

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