4. Wells
  5. Valves, closures or changeable restrictors
  6. Fluid operated

Brian A. Roth

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Computer controlled gas lift system

Wells – Automatic
Patent

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Downhole flow control devices

Wells – Automatic
Reexamination Certificate

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Downhole flow control devices

Wells – Automatic
Patent

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Downhole flow control devices

Wells – Automatic
Reexamination Certificate

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Downhole flow control devices

Valves and valve actuation – Valve actuator is valve casing or extension thereof – Sleeve valve
Reexamination Certificate

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Profile ID: LFUS-PAI-P-348849

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