Plunger lift system

Details Plunger lift system Plunger lift system

2007-03-13

2007-03-13

Bagnell, David (Department: 3672)

Wells

With eduction pump or plunger

C166S068500, C417S056000, C417S058000

Reexamination Certificate

active

11162805

ABSTRACT:
An intermittent lift plunger includes at least one seal mandrel, a bottom sub and an upper valve assembly. The valve assembly is closed by a well bottom stop which inserts into the lift plunger and opened by a lubricator stop at the top of the well. The seal mandrel includes a sleeve seal formed from an elastomeric rubber or plastic, which inflates to engage the well bore surface when the valve is closed and a pressure differential exists.

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patent: 2003/0215337 (2003-11-01), Lee

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