4. Geometrical instruments
  5. Gauge
  6. Internal

John G. Deaton

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Gamma ray spectral tool for borehole use

Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent

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Multiple caliper arms capable of independent movement

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Reversed leaf spring energizing system for wellbore caliper arms

Geometrical instruments – Gauge – Internal
Patent

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Profile ID: LFUS-PAI-P-457524

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