FIELD: oil industry.
SUBSTANCE: method comprises receiving noise of discharging jet with the use of two acoustical pickups, converting the noise into voltage, digitization, filtering, and analyzing. The acoustical pickups are set at one site of the pipeline. One of the pickups receives acoustical waves, which propagate over the shell of the pipeline. The second one receives acoustical waves which propagate in the ambient fluid. The signal received are analyzed to determine co-spectra, and the values of the real and imaginary parts of the co-spectra indicate time lag between the signals which propagate in two fluids.
EFFECT: enhanced reliability of detecting.
3 cl, 1 dwg
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