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Actuation method

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Analysis and identification of a drilling fluid column based on

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus and method for determining boring direction when borin

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus and method for positioning a tool in a deviated sectio

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus and method for positioning a tool in a deviated sectio

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus for electromagnetically coupling power and data signal

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Apparatus for locating a member in a borehole

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Borehold telemetry system

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Borehold telemetry system

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Coal boundary detection using an electric-field borehole...

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Common interface architecture for horizontal directional...

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Common interface architecture for horizontal directional...

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Communications system having redundant channels

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Controlling an underground object

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Controlling an underground object

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Data transmission system

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Downhole power generation and communications apparatus and...

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Drill string rotation encoding

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate

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Drilling assembly with reduced stick-slip tendency

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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Dual spectra well logging system

Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Patent

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