| 本文已被：浏览次 下载次 |
码上扫一扫！ |
|
|
|
| A diagnosis model on working condition of pumping unit in oil wells based on electrical diagrams |
|
CHEN Dechun1, XIAO Liangfei1, ZHANG Ruichao2, YAO Ya1, PENG Yuandong3, YANG Kangmin3
|
|
(1.School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China;2.College of Petroleum Engineering, Shengli College China University of Petroleum, Dongying 257061, China;3.Institute of Petroleum Engineering Technology of Henan Oilfield, Zhengzhou 473000, China)
|
| Abstract: |
| The real-time diagnosis on the working conditions of oil production well system can be carried out based on the electrical diagram data of oil pumps, in which the characteristics of the electrical diagram at typical working conditions should be understood. In this paper, a mathematical model transforming the mechanical work diagram of the pump rod to electrical diagrams was derived in consideration of various factors, including the actual angular velocity of the crank, the inertia and friction of the four bar linkage. A diagnostic model and software was compiled, in which 13 typical electrical diagrams corresponding to different working conditions were considered. The results for case studies of 5 wells show that the average relative errors of the peak power in up and down strokes, the range of power and the average power between measured electrical diagrams and those calculated are 1.74%,3.89%,2.96%,1.74% respectively. The diagnosis results on the working conditions of 6 wells in an oilfield have shown the effectiveness and accuracy of the new method. |
| Key words: rod pumping well electrical diagrams working condition diagnosis characteristic value |
|
|