4. Communications, electrical: acoustic wave systems and devices
  5. Wellbore telemetering
  6. Through well fluids
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Acoustic system for communication in pipelines

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

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Acoustic system for communication in pipelines

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

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Apparatus and method for filtering signals in a logging-while-dr

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

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Apparatus and method for generating electrical power in a...

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

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Apparatus and method for transmitting downhole conditions to the

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

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Apparatus for signalling within a borehole while drilling

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

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Apparatus for signalling within a borehole while drilling

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

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Apparatus for the generation of pressure pulses in drilling mud

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

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Apparatus for transmitting data from a borehole to the surface o

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

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Autonomous data transmission apparatus

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

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