两层分采有杆抽油系统井下故障诊断方法  

DOWNHOLE FAULT DIAGNOSING METHOD FOR THE SUCKER-ROD OIL PUMPING SYSTEM OF TWO-LAYER SEPARATED PRODUCTION

作　　者：赖欣[1] 汪春浦 

机构地区：[1]西南石油大学电气信息学院,四川成都610500 [2]川庆地质勘探开发研究院,四川成都610051

出　　处：《大庆石油地质与开发》2013年第1期150-153,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项（2008ZX05026-001-09）和西南石油大学科技基金资助项目（2010XJZ201）.

摘　　要：两层分采有杆抽油系统的抽油泵由上、下泵构成，系统的工况诊断需要分别获得井下上、下泵示功罔，现有的测试手段无法直接检测。提出了2层分采有杆抽油系统示功图分解方法，阐述了系统示功图的分解原理、动载荷确定和分解步骤，将复杂的分采系统井下故障诊断转化为上、下泵单独工作时的2套常规有杆抽油系统的井下故障诊断，结合系统故障诊断模型求解得到上、下泵各种工况下的载荷，绘制出上、下泵井下示功图，用于完成故障诊断。现场实例计算表明，诊断结果能较好地反映系统的实际工况，可以满足T程设计要求。The pump of the two-layer separated production sucker-rod oil pumping system is composed of the lower and upper pumps. The downhole indicator diagrams of the above two pumps are required to be obtain the diagnoses of the system operating conditions. But the current testing methods can not directly detect them. Therefore the de- composition method of the indicator diagrams for the sucker-rod oil pumping system are proposed. It illustrates the decomposition principles, the determination of the dynamic load and the steps in detail. So the complex downhole fault diagnoses of the separated production system are converted into two sets of downhole fault diagnoses of conven- tional sucker rod oil pumping system with the individual operation of the two pumps. Combined with the system fault diagnosing model, the loads under various working conditions for the pumps are obtained, the diagrams of the downhole indicators are drawn, and finally the systematical downhole fault diagnoses can be realized. The calcula- tion of the field case shows that the diagnostic results can much better reflect the actual running conditions of the system and meet the requirements of the engineering design.

关 键 词：两层分采 故障诊断 示功图 诊断模型 动载荷 静载荷 

分 类 号：TE933.3[石油与天然气工程—石油机械设备]