HY型抽油杆应用性能分析与评价  

Performance Analysis and Evaluation of HY Type Sucker Rod

作　　者：陈汉[1] 李晓明[2] 黎平[3] 申云南 张春辉[5] 李志杰 闫澎思[2] 

机构地区：[1]长庆油田技术监测中心 [2]长庆油田第三采油厂 [3]长庆油田第五采油厂 [4]中国华油集团银川分公司 [5]长庆油田第二采油厂 [6]中国石油集团川庆钻探长庆井下技术作业公司

出　　处：《石油机械》2017年第11期99-104,共6页China Petroleum Machinery

摘　　要：抽油杆是连接抽油机与深井泵的动力传递装置,是有杆泵采油系统的重要组成部分,抽油杆失效直接影响机采系统的正常生产。鉴于此,对HY和HL型抽油杆的力学性能进行了试验对比分析。试验结果表明:表面质量、淬硬层深度和抗拉强度是影响疲劳性能的主要指标,过渡区和扳手方占断裂位置的77.8%,任何一项力学性能指标达不到最优数值,其疲劳性能试验循环周次就会远低于106,无法满足标准规定值;目前所有HY型抽油杆的扳手方和台肩位置全部未见明显淬硬层;其组织不均匀,为屈氏体+回火索氏体;杆体表面淬硬层全部存在不均匀的问题,造成过渡区、扳手方和淬硬层不均匀是疲劳裂纹的启裂核心,形成扩展区和瞬断区后发生疲劳断裂。研究结果可为HY型抽油杆的检验和现场应用提供参考。The sucker rod is a power transmission device connecting the pumping unit and the deep well pump,which is an important part of the rod pumping system. The failure of the sucker rod directly affects the normal production of the artificial lifting system. The mechanical properties of HY and HL type sucker rods were compared and analyzed. The results show that the surface quality,the depth of hardened layer and the tensile strength are the main indexes that affect the fatigue performance. The transition zone and the wrench area accounted for77. 8% of the fracture position. If one of the mechanical performance indexes cannot reach the optimal value,the fatigue performance test cycle will be much lower than 106,and cannot meet the standard requirements. All HYtype sucker rod wrench and shoulder position have no obvious hardened layer,which have an uneven structure,and belong to tempering sorbite. Rod surface hardened layer did not have uneven problems,so that the transition zone,the wrench area and the uneven hardened layer are the fatigue crack initiation core,the expansion layer and fault zone lead to the occurrence of fatigue fracture.

关 键 词：HY型抽油杆 表面淬硬层 抗拉强度 疲劳性能 微观组织 疲劳断口 

分 类 号：TE393[石油与天然气工程—油气田开发工程]