4. Boring or penetrating the earth
  5. Means traveling with tool to constrain tool to bore along...

Donald M. Sawyer

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Gravity oriented directional drilling apparatus and method

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along...
Reexamination Certificate

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Smart clutch

Boring or penetrating the earth – Processes – Boring curved or redirected bores
Reexamination Certificate

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Wellbore sidetrack plug

Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2100334

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