焊管2012，Vol.35Issue(6)：5-8,4.
连续管疲劳寿命试验研究
Experimental Study on Fatigue Life of Coiled Tubing (CT)
毕宗岳 1张晓峰 2张万鹏1
作者信息
- 1. 国家石油天然气管材工程技术研究中心,陕西宝鸡721008
- 2. 宝鸡石油钢管有限责任公司钢管研究院,陕西宝鸡721008
- 折叠
摘要
Abstract
According to the practical oilfield operation condition of coiled tubing, a low cycle fatigue testing machine based on plastic deformation was developed. The fatigue test result of CT80 coiled tubing indicatcd that with diameter decreasing or wall thickness increasing, the fatigue life is obviously increased, with internal pressure increasing, the fatigue life is obviously reduced ; the higher ihe yield strength of coiled tubing with the same steel grade is, the longer fatigue life is . Meanwhile, it showed that surface defects on coiled tubing and inside inclusions will greatly affect its fatigue life, the bigger size of defect and inclusion is, the shorter fatigue life is . Moreover, the fatigue life of coiled tubing with circumferential butt welded joint is obviously lower than that of pipe body.关键词
连续管/疲劳寿命/屈服强度/表面缺陷Key words
coiled tubing(CT)/ fatigue life/ yield strength/ surface defect分类
矿业与冶金引用本文复制引用
毕宗岳,张晓峰,张万鹏..连续管疲劳寿命试验研究[J].焊管,2012,35(6):5-8,4.
