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Acoustic well logging system having multiplexed filter digitizin

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Adaptive telemetry system for hostile environment well logging

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Apparatus and method for logging wells while drilling

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Battery conservation

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Reexamination Certificate

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Communications protocol for digital telemetry system

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Communications protocol for digital telemetry system

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
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Communications systems in a well

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
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Device for transmitting to the surface the signal from a transmi

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Downhole telemetry system having discrete multi-tone...

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Reexamination Certificate

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Downward communication in a borehole through drill string...

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Reexamination Certificate

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Drill string telemetry system

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Reexamination Certificate

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Drilling system with downhole apparatus for determining paramete

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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High data rate acoustic telemetry system using multipulse...

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Reexamination Certificate

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Low frequency electromagnetic telemetry system employing...

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Reexamination Certificate

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Method and apparatus for mud pulse telemetry

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Reexamination Certificate

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Method and apparatus using casing and tubing for transmitting da

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Method and apparatus using casing for combined transmission of d

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Method for transmitting data over logging cable

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Multiplex submersible pump telemetry system

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent

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Noise tool and method

Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
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