4. Wells
  5. Valves, closures or changeable restrictors
  6. Longitudinally movable operator

Jeffrey Lembcke

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Debris protection for sliding sleeve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Reexamination Certificate

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Method and apparatus for downhole artificial lift system...

Wells – Processes – Dissolving or preventing formation of solid oil deposit
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2171050

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