Valve means having multiple seats for supporting and...

Details Valve means having multiple seats for supporting and... Valve means having multiple seats for supporting and...

E - Fixed Constructions

21

B

166/41

E21B 43/12 (2006.01) E21B 34/12 (2006.01)

Patent

CA 1270190

ABSTRACT OF THE DISCLOSURE A well pumping system operative selectively to pump fluids (1) through the production tube and the annular space between the production tube and the well casing simultaneously (2) through the production tube solely or (3) through the annular space solely, without having to pull the rod string and/or the tube string.

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