4. Boring or penetrating the earth
  5. Bit or bit element
  6. Cutting edges relatively longitudinally movable during...
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Adaptive control concept for hybrid PDC/roller cone bits

Boring or penetrating the earth – Bit or bit element – Cutting edges relatively longitudinally movable during...
Reexamination Certificate

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Lateral entry guidance system (LEGS)

Boring or penetrating the earth – Bit or bit element – Cutting edges relatively longitudinally movable during...
Reexamination Certificate

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Rotary drill bit having moveable formation-engaging members

Boring or penetrating the earth – Bit or bit element – Cutting edges relatively longitudinally movable during...
Patent

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