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Method for the magnetization of well casing

  • US 4,465,140 A
  • Filed: 09/28/1982
  • Issued: 08/14/1984
  • Est. Priority Date: 09/28/1982
  • Status: Expired due to Term
First Claim
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1. A method of magnetizing a well casing, comprising the steps of:

  • (a) moving a direct current magnetizing means relative to the well casing to create a magnetic anomaly along said casing, and(b) periodically reversing the direction of the magnetic field of said magnetizing means at each of a plurality of successive spaced points as said magnetizing means moves relative to said casing to create a plurality of spaced and alternating north and south monopoles defining a plurality of spaced magnetic flux leakage points in and along said casing.

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