METHOD OF DIAGNOSTIC CONTROLLING TECHNICAL PARAMETERS OF UNDERGROUND PIPELINE Russian patent published in 2017 - IPC G01N27/82 

FIELD: physics.

SUBSTANCE: method includes initiating the variable magnetic field in the area of the pipeline, measuring induction of the variable magnetic field created by the current pipeline over and around the pipeline, measuring the distance from the sensors to the pipeline axis projection on the surface, indexing the magnitude and direction of the sensor removal from the pipeline axis projection, based on which the operator adjusts the path along the pipeline, determining the rotation angles of the field sensors around the horizontal and vertical axes, getting matrix amendments related to the rotation angles of the sensors and their distance relative to the axis of the pipeline, amending the matrix component fields and their differences. The matrix of the magnetic field sensors are moved both along and across the axis of the diagnosed pipe in both directions at a distance not less than ten times the depth of its foundations, measurement of induction vectors is conducted in the space of the variable magnetic field generated by currents in the pipelines, situational picture of the magnetic fields is received near the test pipeline, calculations are carried out and it is determined, at which actual values of currents, depths of the pipelines and the distances between them the calculated situational picture of the vector distribution of the magnetic field around the pipeline measured will correspond to the diagnosed distribution, then in the calculations currents are deducted from nearby pipelines, when conducting measurements of the processing results, when the locations of anomaly sources are determined in the variable magnetic field and parameters of infringements of the pipeline isolation.

EFFECT: increasing the reliability and accuracy of diagnostic controlling technical parameters of the underground pipeline, regardless of the conditions of its location in the technical corridor or on the technological platform, when moving the magnetic field sensors over the pipeline the degree of actual influence on the diagnosed pipeline of magnetic interference is determined from the adjacent pipelines located in the immediate vicinity.

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