ANALYSIS OF FATIGUE FAILURE OF DRILL PIPE IN AIR DRILLING

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 (TOB) 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.

作者: ZHAO Guanghui LIANG Zheng

作者单位: School of Mechatronic Engineering, SWPU, Chengdu 610500, P.R. China

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）