Exxon Production Research Company

Felix N Kusenberger, Deceased

William Dean Perry

Mark C Moyer

H Stanley Silvus

William C Gibson

A device for detecting defects in the bore of a tubular member. The device includes an inspection head including an electromagnet for magnetizing the internal surface of a tubular member. The device also includes a sensor or sensors to detect magnetic flux leakage indicative of a defect. The magnetic flux sensor output is sent to a control-data acquisition system concurrently with signals as to the axial and circumferential position of the defect, which are obtained by their respective encoders. The control-data acquisition system is capable of processing and displaying the data in analog and digital form.

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San Antonio, TX, United States of America

Felix N Kusenberger, Deceased