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Device for adjusting the path of a rotary drilling tool

Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Patent

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Device for controlling the orientation of bore holes

Boring or penetrating the earth – Automatic control
Patent

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Device for controlling weight on bit of a drilling assembly

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Patent

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Device for drilling a hole in the side wall of a bore hole

Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Patent

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Device for guiding a drilling tool into a well and for exerting

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Patent

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Device for remote actuating equipment comprising delay means

Boring or penetrating the earth – Automatic control – Of fluid pressure below ground
Patent

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Device for remotely operating and assembly comprising a bean/nee

Boring or penetrating the earth – Automatic control – In response to drilling fluid circulation
Patent

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Devices and methods for power control in horizontal...

Boring or penetrating the earth – Automatic control – Of fluid pressure below ground
Reexamination Certificate

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Directional boring machine

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Patent

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Directional casing drilling

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate

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Directional drilling apparatus

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Patent

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Directional drilling apparatus

Boring or penetrating the earth – Automatic control – In response to drilling fluid circulation
Reexamination Certificate

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Directional drilling control

Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Reexamination Certificate

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Directional drilling control

Boring or penetrating the earth – Automatic control
Reexamination Certificate

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Directional drilling machine and method of directional drilling

Boring or penetrating the earth – Automatic control – Of advance or applied tool weight
Reexamination Certificate

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Directional drilling tool

Boring or penetrating the earth – Automatic control – In response to drilling fluid circulation
Patent

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Directional drilling tool

Boring or penetrating the earth – Automatic control – In response to drilling fluid circulation
Patent

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Directional drilling tool apparatus and method

Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Patent

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Distributed intelligence for enhanced monitoring and control...

Boring or penetrating the earth – Automatic control
Reexamination Certificate

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Distributed sensors-controller for active vibration damping...

Boring or penetrating the earth – Automatic control – Of boring means including a below-ground drive prime mover
Reexamination Certificate

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