| 抽油机井油管断裂失效性质的判定 |
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| 引用本文： | 杜秀华,孟庆武,何富君,赵晓京,李振刚.抽油机井油管断裂失效性质的判定[J].石油机械,2000,28(3). |
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| 作者姓名： | 杜秀华 孟庆武 何富君 赵晓京 李振刚 |
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| 作者单位： | 大庆石油学院机械系 |
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| 基金项目： | 中国石油天然气总公司95攻关项目!“抽油机井油管断裂机理、失效抗力指标及预防措施研究”中的一部分。 |
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| 摘 要： | 油管内壁载荷谱测定进一步明确了油管在工作状态下承受轴向拉 -拉交变载荷 ,其断裂部位全部在应力集中的齿根处。对油管断口进行了宏现和微观形貌分析。宏观上可明显观察到疲劳断口的裂纹扩展区和瞬断区 ;微观上在少数油管断口中观察到了典型的疲劳辉纹 ,在很多断口上观察到了疲劳台阶和二次裂纹。由此可以断定油管断口属疲劳断口 ,油管的断裂失效性质是疲劳断裂。
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| 关 键 词： | 抽油机井 油管 疲劳断裂 微观结构 |
Judgement of fracture failure of tubing in rod-pumped well |
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| Du Xiuhua.Judgement of fracture failure of tubing in rod-pumped well[J].China Petroleum Machinery,2000,28(3). |
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| Authors: | Du Xiuhua |
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| Abstract: | Load spectrum determination of tubing inwall proves the tubing is acted by the axial alternating load in a rod pumped well, and all the fractures are located at the root of the tooth. The macroscopic structure and microstructure of the tubing fractures are analyzed. Crack spreading area and transient breaking are observed, typical fatigue striations, fatigue steps and secondary cracks are observed on some of the fractures. Therefore it can be judged that the fractures in the tubing are fatigue fractures and the tubing failure is caused by fatigue fracture. |
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| Keywords: | rod pumped well tubing fatigue fracture microstructure |
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