4. Boring or penetrating the earth
  5. Means traveling with tool to constrain tool to bore along...
  6. Normally curved guide or shaft
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Drainhole drilling assembly

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent

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Drainhole drilling assembly with oriented elliptic drill collar

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent

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Drilling tool

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent

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Leading body for ground drilling and ground drilling machine

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

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Method and apparatus for optional straight hole drilling or dire

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent

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Reaming apparatus and method with enhanced stability and transit

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent

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Reaming apparatus and method with enhanced stability and transit

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Normally curved guide or shaft
Patent

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System and method for directional drilling utilizing clutch...

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

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Systems and methods for reducing backward whirling while...

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

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