Fluid bypass control for producing well plunger assembly

Details Fluid bypass control for producing well plunger assembly Fluid bypass control for producing well plunger assembly

1984-01-11

1985-07-30

Look, Edward K.

Pumps

Drilled well free piston-type pump

Radially expansible piston portion controls pump and motor...

92193, 92247, F04B 4712

Patent

active

045318913

ABSTRACT:
The mandrel of a fluid lift plunger carries pads retracted from a tube string by the continuous bias of collapsing springs. A control rod is displaceable relative to the mandrel causing a change in the force of detent springs which exert a continuous radially outward bias on the pads. In the detent held position assumed by the control rod during upward plunger travel, a higher detent spring force is exerted on the pads to overcome the collapsing springs and hold the pads in wiping contact with the tube string.

REFERENCES:
patent: 2267902 (1941-12-01), Eddins
patent: 3055306 (1962-09-01), Tausch
patent: 3249056 (1966-05-01), Lyles
patent: 4239458 (1980-12-01), Yeatts

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