Rod Pump Intelligent Fault Diagnosis Method

In the mechanical oil extraction, The rod pumping is the predominant technique. If there is a way to grasp the working condition of the rod pumping system prompt and accurately ,diagnose problem which the oil well exists, establishe the reasonable technical measure, makes the oil well restore the regular production promptly , enhances the work efficiency and the oil well output. Then will have extremely vital significance for enhance the economic efficiency of a enterprise. The dynamometer card diagnosis is the most universal method current for rod pumping well production operating mode distinguish. But, the oil well breakdown not only has the very relations with the dynamometer card shape, moreover also was decided by the oil well's production parameter, the production data. The same dynamometer card might correspond to different breakdown (for example regular production dynamometer card and drill tubing dropout dynamometer card basic consistent, oil rod broke away with pulls out spurts basically same), One breakdown may have two quite different dynamometer card characteristic (for example fluid supply insufficient dynamometer card's "knife handle" position may be not similar). Rod pumping well's breakdown diagnosis is a quite complex question, only depends on the expert system or the nerve network can't complete the diagnosis, although at present appeared the synthesis diagnosis system, but it is only integrates several diagnoses methods together simply, but is not its organic union. So it's very necessity to organize several different diagnoses methods together to carry on the diagnosis.This article analyze sucker rod dynamic behavior based on elaborating the pole pumping installment and rod pump's working principle .established the wave equation to descript. the pole column dynamics characteristic. And basis on diagnoses model, obtains the dynamometer card of rod column free cross section...