Patent ID: 7679480

Claim:
A method of magnetizing a wellbore tubular, the method comprising: (a) positioning a wellbore tubular substantially coaxially in a plurality of longitudinally spaced magnetizing coils deployed on a frame via driving the tubular in an axial direction along a track of non-magnetic rollers with an electric motor; (b) connecting the plurality of magnetizing coils to an electrical power source such that a circumferential non-alternating electrical current flows in a clockwise direction about the wellbore tubular in a first subset of the coils and in a counterclockwise direction about the wellbore tubular in a second subset of the coils so as to impart a predetermined magnetic field pattern to the wellbore tubular having at least one pair of opposing magnetic poles; (c) disconnecting the magnetizing coils from the electrical power source; and (d) removing the wellbore tubular from the coils via driving the tubular in an axial direction along a track of non-magnetic rollers with an electric motor.