偏心堵塞器投送可靠性研究及其应用

Research on Delivery Reliability of Eccentric Plug and Its Application

针对油田注入井偏心堵塞器投送成功率低、堵塞器掉卡频发及投送工具遇阻等故障现象,开展偏心堵塞器投送系统现状统计,建立投送系统串联型可靠性模型;依据投送系统可靠性影响因子,开展各组件可靠性分配;运用故障树分析法(FTA)开展投送系统大数据分析;利用功能分析与剪裁进行TRIZ系统分析;运用技术物理矛盾法、物场分析法提出TRIZ解决方案。通过综合运用可靠性技术及TRIZ创新方法,在投送系统故障树分析中,得出压送头各机件失效、井下遇阻2项基本事件所产生的故障概率较大;通过投送系统的技术物理矛盾分析、物场分析,确定需要改善的工程参数为压送头与堵塞器滑动摩擦力,恶化的工程参数为压送头投送堵塞器的可靠程度;通过查找阿奇舒勒矛盾矩阵表获得4种解决方案,并完成TRIZ专利发明3个。结合专利技术推广应用,偏心堵塞器一次投送成功率由原来的78.5%上升到84.6%以上,提升了施工效率,减少了投送系统的故障,进一步提高偏心堵塞器投送系统可靠性与TRIZ创新水平。

In view of the low success rate of eccentric plug delivery in oil field injection wells,the frequent sticking or dropping of plug and the resistance failure of delivery tools,the current situation statistics of eccentric plug delivery system are carried out,and the series reliability model of the delivery system is established;The reliability distribution of each component is carried out according to the reliability influence factors of the delivery system;The big data analysis of the delivery system is carried out by using fault tree analysis(FTA);The TRIZ system is analyzed by functional analysis and clipping;The TRIZ solution is proposed by using technical physical contradiction method and material field analysis method.Through the comprehensive application of reliability technology and TRIZ innovation method,in the fault tree analysis of the delivery system,it is concluded that the failure probability of two basic events,namely,the failure of each mechanical part of delivery head and downhole resistance,is high;Through the technical and physical contradiction analysis and material field analysis of the delivery system,it is determined that the engineering parameter to be improved is the sliding friction between the delivery head and the plug,and the deteriorated engineering parameter is the reliability of the delivery head delivering the plug;Four solutions were obtained by looking up the Archie Schuler contradiction matrix table,and three TRIZ patented inventions were completed.Combined with the popularization and application of the patented techniques,the success rate of one-time delivery of eccentric plug has increased from 78.5%to more than 84.6%,which improves the construction efficiency,reduces the failure of delivery system,and further improves the reliability of eccentric plug delivery system and TRIZ innovation level.