Fatigue Analysis of the Drill String According to Multiaxial Stress

被引：1
|
作者：
Zhang, JianBing [1 ]
Lv, XiangHong [1 ]
机构：
[1] Xian ShiYou Univ, Xian, Shaanxi, Peoples R China
来源：
MATERIALS PROCESSING TECHNOLOGY, PTS 1-3 | 2012年 / 418-420卷
关键词：
drill string; fatigue failure; multiaxial stress;
D O I：
10.4028/www.scientific.net/AMR.418-420.993
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To find out the cause for fatigue failure of a drill string used in oil field drilling, and considering the actual working conditions, axial, radial and circumferential cyclic stresses borne by the drill string in borehole of oil and gas well, fatigue strength of drill string is analyzed based on multi-axial fatigue assessment method. Then the formula to calculate the mean stress of multi-axial load of the drill string is obtained, and the formula serves. as a method to calculate multi-axial fatigue life of the drill string, which has been verified through field data. It is realized that multi-axial stress has significant influence on drill string fatigue. When on drill string fatigue, Soderberg equation shall be employed to calculate the stress amplitude of drill string fatigue.
引用
收藏
页码：993 / 996
页数：4
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