4. Valves and valve actuation
  5. Mechanical movement actuator
  6. Screw

David G. Hosie

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Apparatus for wellbore communication

Wells – Processes – Assembling well part
Reexamination Certificate

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Apparatus for wellbore communication

Boring or penetrating the earth – With signaling – indicating – testing or measuring
Reexamination Certificate

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Instrumentation for a downhole deployment valve

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Instrumentation for a downhole deployment valve

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Instrumentation for a downhole deployment valve

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1203249

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