4. Boring or penetrating the earth
  5. Bit or bit element
  6. Bit with leading portion forming smaller diameter initial bore

W. Gregory Presley

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Enhanced offset stabilization for eccentric reamers

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore
Reexamination Certificate

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Reaming apparatus and method with enhanced structural...

Boring or penetrating the earth – Bit or bit element – Bit with leading portion forming smaller diameter initial bore
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2691761

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