4. Wells
  5. Valves, closures or changeable restrictors
  6. Destructible element

John H. Hales

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Downhole tool with navigation system

Wells – With electrical means – Indicating
Reexamination Certificate

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Downhole tool with navigation system

Wells – With electrical means – Indicating
Reexamination Certificate

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Electromagnetic telemetry actuated firing system for well...

Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Reexamination Certificate

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Low actuation pressure bar vent

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

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Method of operating a pressure cycle operated perforating...

Wells – Processes – Placing or shifting well part
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1428234

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