4. Wells
  5. Processes
  6. Assembling well part

Lemuel T. York

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Top drive well casing system

Wells – Above ground apparatus – Moving tubing or cable into an existing well
Reexamination Certificate

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Top drive well casing system and method

Wells – Processes – Assembling well part
Reexamination Certificate

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Valve actuator

Valves and valve actuation – Fluid actuated or retarded – With mechanical movement between actuator and valve
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2723192

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