4. Acoustics
  5. Geophysical or subsurface exploration
  6. Well logging

Juei Igarashi

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Active positioning of downhole devices using spherical motors

Geometrical instruments – Indicator of direction of force traversing natural media – Process
Reexamination Certificate

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Apparatus for azimuth measurements using gyro sensors

Geometrical instruments – Indicator of direction of force traversing natural media – Gyroscopically controlled or stabilized
Reexamination Certificate

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Borehole seismic tool

Acoustics – Geophysical or subsurface exploration – Well logging
Reexamination Certificate

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Optical fiber system and method for wellhole sensing of...

Wells – Processes – With indicating – testing – measuring or locating
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2077227

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