Gas operated automatic, liquid pumping system for wells

Wells – Processes – Producing the well

Reexamination Certificate

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Details

C166S370000, C166S068000, C166S106000, C166S177300, C166S325000, C417S057000, C417S060000, C417S555200

Reexamination Certificate

active

06851480

ABSTRACT:
An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design that releases shut in production gas below the pumping device and provides a positive pressure differential across the pumping device prior to valve opening.

REFERENCES:
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patent: 3941511 (1976-03-01), Morgan
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patent: 5253713 (1993-10-01), Gregg et al.
patent: 5462115 (1995-10-01), Belden et al.
patent: 6554580 (2003-04-01), Mayfield et al.
patent: 523801 (1956-04-01), None
patent: 1289062 (1991-09-01), None
Product Specification for ConCoyle Production Device entitled “An Underground Revolution”, published on or before Apr. 8, 2002.
Product Specification for JetStar Automatic Casing Plunger, published on or before Apr. 8, 2002.

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