| 石油套管钻井中套管柱疲劳寿命实验研究 |
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| 引用本文： | 宋生印,高德利. 石油套管钻井中套管柱疲劳寿命实验研究[J]. 科技导报(北京), 2007, 25(21): 27-30 |
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| 作者姓名： | 宋生印 高德利 |
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| 作者单位： | 中国石油大学石油工程教育部重点实验室,北京,102249;中国石油天然气集团公司石油管力学和环境行为重点实验室,西安,710065;中国石油大学石油工程教育部重点实验室,北京,102249;中国石油天然气集团公司石油管力学和环境行为重点实验室,西安,710065 |
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| 基金项目： | 教育部创新团队项目(IRT0411)，国家自然科学基金重大研究计划项目(90410006) |
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| 摘 要： | 根据相似原理,在对比例试件进行多轴疲劳实验的基础上,采用Von Mises等效应力准则进行等效转换和修正,获得了石油套管管体疲劳寿命的预测模型;按照API SPEC STD 5B标准,将J55钢圆棒材料加工为偏梯形螺纹的牙型缺口试件,通过多轴疲劳实验和回归分析,获得了基于应力和应变的两参数和三参数模型以及类Manson-Coffin模型,可用来预测套管钻井螺纹接头的疲劳寿命;同时,还获得了预测误差在20%以内的石油套管钻井中套管柱疲劳寿命的预测方法。
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| 关 键 词： | 套管钻井 套管柱 多轴疲劳实验 疲劳寿命 |
| 文章编号： | 1000-7857（2007）21-0027-04 |
| 修稿时间： | 2007-08-22 |
Experimental Study on Fatigue Life of Casing String after Casing Drilling |
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| SONG Shengyin,GAO Deli. Experimental Study on Fatigue Life of Casing String after Casing Drilling[J]. Science & Technology Review, 2007, 25(21): 27-30 |
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| Authors: | SONG Shengyin GAO Deli |
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| Abstract: | According to the similarity principle and Von Mises equivalent stress criterion,a predication model for fatigue life of the casing body is established on the basis of multi-axial fatigue testing of the reference specimen.According to API SPEC STD 5B standard,a single tooth type notched specimen for buttress thread is made from the J55 grand casing,and the two-parameter and three-parameter models and Manson-Coffin model based on stress and strain are obtained for predicating the fatigue life of the threaded joint of casing through multi-axial fatigue testing and regression analysis.At the same time,a method for predicting the fatigue life of casing string after casing drilling is also proposed in this paper,with predication error within 20%. |
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| Keywords: | casing drilling casing string fatigue testing fatigue life |
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