4. Boring or penetrating the earth
  5. Tool removable or insertable through or around driving or...
  6. Laterally shiftable cutter element movable through shaft

John M. Kolker

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Drilling apparatus having a radially displaceable reamer

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Multi-layered wellbore junction

Wells – Processes – Parallel string or multiple completion well
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1895891

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