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Steerable directional drilling tool

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent

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Steerable horizontal subterranean drill bit

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Reexamination Certificate

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Steerable horizontal subterranean drill bit having a one...

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Reexamination Certificate

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Steerable horizontal subterranean drill bit having an offset...

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Reexamination Certificate

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Steerable horizontal subterranean drill bit having elevated...

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Reexamination Certificate

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Steerable horizontal subterranean drill bit having offset...

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Reexamination Certificate

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Steerable tool underreaming system

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent

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Surface adjustable adjustable bent housing

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent

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Surface control bent sub for directional drilling of petroleum w

Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent

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