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Ultrasonic imaging in wells or tubulars

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Reexamination Certificate

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Ultrasonic logging apparatus with improved receiver

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent

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Ultrasonic logging tool with rotating exposed transducer

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent

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Ultrasonic measurement apparatus

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent

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Ultrasonic measurement apparatus

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent

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Use of Lamb waves in cement bond logging

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Reexamination Certificate

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Use of minor borehole obstructions as seismic sources

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Reexamination Certificate

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