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Figure F83. A. Ultrasonic Borehole Imager tool string. HNGS = Hostile Environment Natural Gamma Ray Sonde, GPIT = General Purpose Inclinometry Tool, UBI = Ultrasonic Borehole Imager Sonde and rotating sub. B. Schematic of Hole U1374A logging passes (five sections logged where borehole was measured to be ≤30 cm in diameter, starting at bottom of hole and moving upward).

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