Fatigue Reliability Evaluation Model of Drillstring in Bending Section of Horizontal Well

被引：0
|
作者：
Yan, Yifei [1 ]
Cheng, Lufeng [2 ]
机构：
[1] China Univ Petr, Coll Electromech Engn, Qingdao 266555, Shandong, Peoples R China
[2] China Petr Engn & Construct Corp, Beijing 100120, Peoples R China
来源：
MECHATRONICS AND INTELLIGENT MATERIALS II, PTS 1-6 | 2012年 / 490-495卷
关键词：
drillstring; Bending Section; Fatigue Damage Cumulation; Fatigue Reliability;
D O I：
10.4028/www.scientific.net/AMR.490-495.2295
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
When drillstring rotates through the bending section of horizontal well, the fatigue damage of drillstring will be caused by alternating bending stress. Therefore, a thought to solve the fatigue reliability problem of drillstring in bending section of horizontal well is proposed. The variable amplitude alternating stress is transformed into equivalent fatigue stress, and the fatigue damage of drillstring is analyzed. Considering Palmgren-Miner rule and S-N curve, the fatigue life and reliability evaluation model of drillstring in bending section of horizontal well is established according to the fatigue reliability theory and probabilistic fracture mechanics. This model can calculate the fatigue damage, fatigue life and reliability of drillstring in the process of drilling and the maximum allowable dogleg angle where the drillstring is under compression and tension. And it has the important reference value for the fair use of drillstring and casing program design.
引用
收藏
页码：2295 / +
页数：2
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