Diagnostics of the Condition of Sucker-Rod Pumping Units after the Analysis of Wattmeter Cards

The paper is dedicated to the problem of automation of oil producing wells operated by sucker-rod pumps. The method of mathematical processing of wattmeter cards for the diagnostics of sucker-rod pumping units, which allows controlling the condition of surface equipment of the pumping unit, has been developed. The balanced state, as well as the efficiency factor of the pumping unit can be calculated with the help of wattmeter cards. The analysis of wattmeter card spectrum allows detecting vibrational and impact loads, thus helping to diagnose the defects of the gearbox and bearings.