4. Boring or penetrating the earth
  5. Bit or bit element
  6. Specific or diverse material

Lester I. Clark

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Cutting elements configured for casing component drillout...

Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate

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Method of drilling out a reaming tool

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

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Reaming tool suitable for running on casing or liner

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2292406

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