4. Communications, electrical: acoustic wave systems and devices
  5. Wellbore telemetering
  6. Through drill string or casing
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Impedance matched joined drill pipe for improved acoustic transm

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

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Integrated well drilling and evaluation

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

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