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Packer deflate subassembly for an inflatable packer system

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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PDF valve

Wells – Valves – closures or changeable restrictors – Destructible element
Reexamination Certificate

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Plug for operating a downhole device using tubing pressure

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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Pressure operated test tool

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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Pressure operated valve

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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Pressure-controlled well tester operated by one or more selected

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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Production fluid control device and method for oil and/or gas we

Wells – Valves – closures or changeable restrictors – Destructible element
Patent

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Production fluid control device and method for oil and/or...

Wells – Valves – closures or changeable restrictors – Destructible element
Reissue Patent

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