4. Communications, electrical: acoustic wave systems and devices
  5. Wellbore telemetering
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Electrical measuring while drilling with composite electrodes

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering
Patent

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Electromechanical transducer for acoustic telemetry system

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through drill string or casing
Patent

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Electromechanical transducer for acoustic telemetry system

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through drill string or casing
Patent

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Electronic noise filtering system

Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Patent

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