4. Wells
  5. Processes
  6. Operating valve, closure, or changeable restrictor in a well

John V. Fredd

Inventor

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Actuator

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent

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Actuator

Wells – Packers or plugs – Controllable passage through packer
Patent

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Apparatus for and method of operating a well

Wells – Processes – With indicating – testing – measuring or locating
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Equalizing ball valve member

Fluid handling – Systems – Multi-way valve unit
Patent

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Flapper valve

Wells – Valves – closures or changeable restrictors – Fluid operated
Patent

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Profile ID: LFUS-PAI-P-242776

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