4. Wells
  5. Valves, closures or changeable restrictors
  6. Fluid operated

John M Deboer

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Downhole automatic tool release and method of use

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

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Downhole automatic tool release and method of use

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

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Downhole flow control apparatus, operable via surface...

Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate

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Downhole flow control apparatus, operable via surface...

Wells – Valves – closures or changeable restrictors – Fluid operated
Reexamination Certificate

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Metal face seal for an earth-boring bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2361589

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