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Linear actuation system in the form of a ring

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

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Lock open and control system access apparatus and method for...

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

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Low power miniature hydraulic actuator

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

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Low pressure responsive downhole tool

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

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Low pressure responsive downhole tool with cam actuated relief v

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

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Low pressure responsive downhole tool with differential pressure

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

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Low pressure responsive downhole tool with floating shoe retardi

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

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Lubricator for underbalanced drilling

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

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Lubricator valve with rotational flip-flap arm

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

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