Analysis of fatigue failure of drill pipe in air drilling

被引：0
|
作者：
Zhao Guanghui [1 ]
Liang Zheng [1 ]
机构：
[1] SWPU, Sch Mechatron Engn, Chengdu 610500, Peoples R China
来源：
ENGINEERING STRUCTURAL INTEGRITY: RESEARCH, DEVELOPMENT AND APPLICATION, VOLS 1 AND 2 | 2007年
关键词：
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
On the basis of the working condition of Puguang gas field in Sichuan province of China, dynamic analysis of the drill pipes (DP) near the bottom-hole assembly (BHA) in air drilling and prediction of fatigue life were carried out roundly. Influence of the drilling parameters on the DP's fatigue life was presented. It's found that the bending wave caused by backward precession of BHA has a main effect on the DP's fatigue fracture. Small increasing of torque on bit JOB) shortens fatigue life greatly. Higher speed of rotation (SOR) corresponds to shorter fatigue life for it aggravating axial and transverse vibration. Increasing weight on bit (WOB) reduces fatigue life due to decreasing tension of DP, increasing transverse vibration and TOB.
引用
收藏
页码：411 / 413
页数：3
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