FIELD: oil and gas industry.
SUBSTANCE: invention relates to devices and methods for evaluating health of oil-field pumping equipment. Typical system for monitoring health of the pump unit receives angular position data containing angular positions associated with operation of the pump and parametric data containing values of the parameter associated with the pump unit, variable depending on angular positions. Monitoring system calculates the parametric data cepstrum depending on the angular position data and determines the ratio of the first cepstrum amplitude with the close to zero quefrency value to the second cepstrum amplitude with a non-zero quefrency value. Calculated ratio is an indicator of serviceability of the pump unit component.
EFFECT: reduced maintenance cost of pump units.
18 cl, 17 dwg
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