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

John T. Brandell

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Casing inflation packer

Wells – Packers or plugs – With controllable passage between central chamber and space...
Patent

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Casing packer shoe

Wells – Packers or plugs – With controllable passage between central conduit and space...
Patent

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Casing valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Patent

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Down hole pump and testing apparatus

Wells – With eduction pump or plunger – With packer or plug
Patent

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Downhole pump and testing apparatus

Wells – With eduction pump or plunger – With packer or plug
Patent

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Profile ID: LFUS-PAI-P-38039

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