Method for the magnetization of well casing
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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Abstract
A well casing is magnetized by traversing an internal magnetizer along and within the well casing while periodically reversing the direction of the magnetic field of the magnetizer to create a plurality of magnetic flux leakage points along the well casing.
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7 Claims
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1. A method of magnetizing a well casing, comprising the steps of:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification