Method and apparatus for correcting magnetic flux sensor...

Details Method and apparatus for correcting magnetic flux sensor... Method and apparatus for correcting magnetic flux sensor...

G - Physics

01

N

G01N 27/82 (2006.01) E21B 47/00 (2006.01) G01S 17/48 (2006.01)

Patent

CA 2587984

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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