4. Communications, electrical: acoustic wave systems and devices
  5. Wellbore telemetering
  6. Through drill string or casing
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Seismic systems and methods with downhole clock synchronization

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

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Sonic vibration telemetering system

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

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Stress wave telemetry system for drillstems and tubing strings

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

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Subsurface well apparatus

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

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System for transmitting a signal

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

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