Method of magnetizing well tubulars

Details Method of magnetizing well tubulars Method of magnetizing well tubulars

H - Electricity

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H01F 13/00 (2006.01) E21B 7/04 (2006.01) E21B 47/022 (2006.01) G01V 3/26 (2006.01)

Patent

CA 1333412

A string of well tubulars, such as a well casing or a drill string, is prior to installation of the string in a borehole magnetized along at least part of the length thereof by creating a magnetic field having flux lines which pass in a substantially longitudinal direction through an elongate section of the string, thereby magnetizing said section such that it has opposed magnetic poles having a polestrength of more than 3000 µWb.

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