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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Angle adjustment sub

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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Apparatus for drilling straight portion of a deviated hole

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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Apparatus for extended straight line drilling from a curved bore

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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Apparatus for forming boreholes

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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Apparatus for optional straight or directional drilling undergro

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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Apparatus for optional straight or directional drilling undergro

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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Arrangement for guiding a bore-crown or bit along a given path

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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Assembly for directional drilling of boreholes

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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