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

Edward E. DeMoss

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Circulating valve

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

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Combination well casing pressure relief and kill valve apparatus

Wells – Processes – Operating valve – closure – or changeable restrictor in a well
Patent

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Gas lift valve

Fluid handling – Diverse fluid containing pressure systems – Gas lift valves for wells
Patent

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Profile ID: LFUS-PAI-P-529356

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