4. Wells
  5. Processes
  6. Graveling or filter forming

John Phillip Barbee, Jr.

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Method and apparatus for catching a pump-down plug or ball

Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate

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Method and apparatus for placing a gravel pack in an oil and...

Wells – Processes – Graveling or filter forming
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2121326

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