摘要
根据井液进出泵筒速度及泵筒内井液压力变化规律分别建立正常工况、气体影响、漏失影响和供液不足等工况下的泵阀运行特性模型,并与杆管液动力学模型进行耦合,形成故障工况下有杆泵采油系统的仿真模型及对故障工况下的有杆泵采油系统运动特性的仿真分析。结果表明:仿真结果与现场实测地面示功图具有良好的一致性且预测产液量平均误差低于6%,验证了故障仿真模型的准确性;碳纤维混合杆柱相对于钢杆采油系统示功图载荷绝对值较小,加载和卸载线较长,谐波个数较少且平滑;气体影响、游动阀漏失会减小加载完成时抽油杆柱的谐振,供液不足、气体影响和固定阀漏失会加剧卸载完成时抽油杆柱的谐振;基于该故障仿真模型可获得碳纤维抽油杆等新型抽油杆故障工况下的示功图图库。
The operating characteristic models of the pump valves under the conditions of normal case,gas influence,leakage influence and insufficient liquid supply were established according to the velocity of the well fluid sucked and discharged of pump barrel and the variation of the hydraulic pressure in the pump barrel.Based on the coupling rod-tube-fluid model,the simulation models of the rod-pump oil production system under fault conditions were obtained.The results show that simulation results are in good agreement with the measured surface dynamometer diagrams and the predicted average error of liquid production rate is less than 6%.This verifies the accuracy of the fault simulation models.Compared with steel rods,the absolute load of carbon fiber mixed rod is smaller,the loading and unloading lines are longer,and the harmonics are less and smoother.The gas and traveling valve leakage will reduce the resonance of sucker rod string at the completion of loading,while the gas,insufficient liquid supply and standing valve leakage will aggravate the resonance of the sucker rod string at the completion of unloading.Based on the simulation models,the indicator diagram library of flexible sucker rod pumping system under fault conditions can be obtained.
作者
吕孝孝
王旱祥
刘延鑫
陈升山
孙秉宇
LüXiaoxiao;WANG Hanxiang;LIU Yanxin;CHEN Shengshan;SUN Bingyu(College of Mechanical and Electronic Engineering in China University of Petroleum(East China),Qingdao 266580,China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第2期117-126,共10页
Journal of China University of Petroleum(Edition of Natural Science)
基金
中央高校基本科研业务费专项(18CX06055A,17CX02022A)
中国石油大学(华东)研究生创新工程项目(YCX2017051)。
关键词
有杆泵
故障诊断
漏失
供液不足
示功图
rod pump
fault diagnosis
leakage
deficient liquid supply
indicator diagrams
