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Acoustic sensing system for downhole seismic applications...

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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Acoustic telemetry systems and methods with surface noise...

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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Acoustic telemetry transceiver

Communications: electrical – Wellbore telemetering or control – Modification of signal bandwidth – frequency – or circuit...
Reexamination Certificate

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Acoustic telemetry transceiver

Communications: electrical – Wellbore telemetering or control – Modification of signal bandwidth – frequency – or circuit...
Reexamination Certificate

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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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Actuation method

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

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Adaptive acoustic transmitter controller apparatus and method

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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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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Adjacent well electromagnetic telemetry system and method for us

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent

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Adjustable shear valve mud pulser and controls therefor

Communications: electrical – Wellbore telemetering or control – Including particular sensor
Reexamination Certificate

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Adjustable shear valve mud pulser and controls therefor

Communications: electrical – Wellbore telemetering or control – Including particular sensor
Reissue Patent

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Advanced digital telemetry system for monocable transmission fea

Communications: electrical – Wellbore telemetering or control – In horizontal or inclined passage arrangement
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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Annulus pressure operated well monitoring

Communications: electrical – Wellbore telemetering or control – Including specified power transmission feature or source
Reexamination Certificate

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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 determining the position and orientatio

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent

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Apparatus and method for down-hole EM telemetry while drilling

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Patent

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Apparatus and method for downhole well equipment and process...

Communications: electrical – Wellbore telemetering or control – Using a specific transmission medium
Reexamination Certificate

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Apparatus and method for downhole well equipment and process...

Communications: electrical – Wellbore telemetering or control – Diagnostic monitoring or detecting operation of...
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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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