4. Communications, electrical: acoustic wave systems and devices
  5. Wellbore telemetering
  6. Through well fluids

Borislav J. Tchakarov

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Centralizers for a downhole tool

Wells – Processes – Placing or shifting well part
Patent

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Down hole gas analyzer method and apparatus

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Reexamination Certificate

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Downhole carbon dioxide gas analyzer

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Reexamination Certificate

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Flexible joint for downhole tools

Wells – Conduit wall or specific conduit end structure – Downhole coupling or connector
Patent

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Method and apparatus for a quadrupole transmitter for...

Electricity: measuring and testing – Of geophysical surface or subsurface in situ – With radiant energy or nonconductive-type transmitter
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1061182

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