FIELD: oil industry.
SUBSTANCE: method comprises measuring characteristics of magnetic field above the pipeline when pickup moves along the pipeline, measuring the value of magnetic induction at sites spaced 0.25-0.5 m apart, plotting dependence of the value of dispersion, and determining the regions where the values of the magnetic induction of the field is equal to or exceeds the value of dispersion.
EFFECT: enhanced reliability.
1 cl, 1 dwg
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