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  6. Operating valve, closure, or changeable restrictor in a well
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Electro-hydraulically pressurized downhole valve actuator...

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

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Electronic completion installation valve

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

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Equalizer valve and associated method for sealing a fluid flow

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

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Equalizing blank valve apparatus and methods

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

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Expandable liner and associated methods of regulating fluid...

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

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Expandable shifting tool

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

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Extendable casing circulator and method

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

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