Method and apparatus for correcting magnetic flux sensor signals
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United States of America Patent
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Issued Date -
Nov 15, 2007
app pub date -
May 9, 2006
filing date -
May 9, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Apparatus for detecting defects in an oilfield string at a well site as the string is pulled from the well include a plurality of magnetic flux sensors 12 circumferentially spaced about the string, and a plurality of stand-off sensors 14 circumferentially spaced about the string for determining changes in stand-off distance between one or more stand-off sensors and an external surface of the string. Computer 18 corrects signals from the plurality of magnetic flux sensors as a function of the detected stand-off distance.
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