Method for the magnetization of well casing

Details Method for the magnetization of well casing Method for the magnetization of well casing

1982-09-28

1984-08-14

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166 65M, 166250, 324346, E21B 1900, E21B 4100

Patent

active

044651406

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.

REFERENCES:
patent: 2259904 (1941-10-01), McNamee
patent: 3114876 (1963-12-01), Schuster
patent: 3277363 (1966-10-01), Schuster
patent: 4224989 (1980-09-01), Blount
patent: 4372398 (1983-02-01), Kuckes
Journal of Petroleum Technology, Jun. 1972, p. 741, Magnetostatic Methods for Estimating Distance and Direction from a Relief Well to a Cased Wellbore, J. D. Robinson et al., see FIG. 1.

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