摘要
为提高深井地层破岩效率,提出螺杆高速旋转条件下配合井下冲击破岩工具的高速旋冲钻井新模式,通过数值模拟研究单个PDC齿在不同工况下岩石的动态破碎过程,并进行高速旋冲钻井现场试验。结果表明:在旋转冲击钻井中,钻头转速增加,钻头吃入地层深度减少,前进阻力增大且波动更为剧烈,岩石破碎效率提高;增大钻头上的冲击力,钻头吃入地层的深度增加,岩石破碎效率提高;增大钻头上冲击力频率,岩石破碎效率提高;螺杆钻具结合自激振荡式高速旋转冲击钻井工具形成的自激振荡式高速旋转冲击钻井技术提高了钻头转速,相对于单独螺杆钻进,提高了切削齿的吃深。
In order to improve the rock-breaking efficiency of deep well,a new high-speed rotary impact drilling assembly mode combine with high-speed rotating PDM and percussion drilling tool was proposed.The dynamic fracture process of rock under different working conditions of single PDC tooth was studied by numerical simulation and the filed test was carried out.The results show that during rotary impact drilling,the depth of the PDC eats into the rock decreases as rotary speed increases,the forward resistance increases.The fluctuation is more severe,and the rock breaking efficiency increases.Also the bit rotation speedis improved by the self-oscillation high-speed rotary drilling technology,which is combined with PDM and self-oscillation rotary drilling tool.And the eating depth of the PDC teeth is improved compared to the single PDM drilling.
作者
景英华
袁鑫伟
姜磊
张恒
倪红坚
JING Yinghua;YUAN Xinwei;JIANG Lei;ZHANG Heng;NI Hongjian(CNPC Xibu Drilling Engineering Company Limited,Korla 841000,China;School of Petroleum Engineering in China University of Petroleum(East China),Qingdao 266580,China)
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第1期75-80,共6页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家自然科学基金青年基金项目(51704323)
国家自然科学基金面上项目(51374234)
关键词
破岩模拟
冲击钻井
螺杆钻具
自激振荡
现场试验
rock breaking simulation
percussion drilling
PDM
self-oscillation
field test
