Downhole well pump

Details Downhole well pump Downhole well pump

2008-10-28

2010-12-07

Bagnell, David J (Department: 3676)

Wells

With eduction pump or plunger

With packer or plug

C166S105000, C166S179000, C166S202000

Reexamination Certificate

active

07845399

ABSTRACT:
An apparatus for use with production tubing to pump fluid from a well to the surface includes a tubular conduit having upper and lower portions. The lower portion has an inner or outer diameter greater than the diameter of the upper portion to form a first internal or external shoulder where the lower and upper portions are engaged. Seals are disposed on the conduit for sealing between the conduit and a well casing. One or more valve sections have a valve adapted to open during downwards motion through fluid and to close during upwards motion through fluid.

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patent: 6973971 (2005-12-01), Sebree
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patent: 2005/0217866 (2005-10-01), Watson et al.
patent: 2006/0169458 (2006-08-01), Jones, Jr.

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