Analysis of Torsional Impact Improving Working Conditions of PDC Bits in Hard Rock Formations

摘要：

　　Life and ROP of PDC bits are improved greatly when rotational impact drill assemblies (TorkBuster) are used in hard rock formations.The transient drilling processes of PDC bits combined with and without TorkBuster are simulated based on ANSYS software when drilling in densify sandstone formations.Simulated results are compared.Its found that the torsion angle of the drill pipe is lessened greatly when torsional impact is loaded with same bit pressure and torque as that without torsional impact.Torsional impact reduces accumulated energy stored in the drill pipe,relieves stick-slip vibration and improves working conditions of PDC bits greatly.

关键词： stick-slip vibration torsional impact ANSYS software torsion angle working condition

作者: Wang hongbo Duan Iongchen Shu shangwen Sun qiyu

作者单位: The Drilling Technology Research Institute of Zhongyuan Oil Field, Puyang 457001, China Engineering Faculty, China University of Geosciences, Wuhan 430074, China

会议类型: 国际会议

会议名称: 3rd International Conference on Frontiers of Manufacturing and Design Science(第三届制造与设计科学前沿国际会议(ICFMD))

会议地点: 香港

会议语种:英文

页码: 412-416

在线出版日期: 2012-12-11（万方平台首次上网日期，不代表论文的发表时间）