半铰接柔性钻具模型建立及载荷传递规律研究  

MODEL ESTABLISHMENT AND LOAD TRANSFER OF SEMI ARTICULATED FLEXIBLE DRILLING TOOL

作　　者：罗敏[1] 董小娜[1] 徐亭亭[1] 李巧珍[1] LUO Min;DONG Xiaona;XU Tingting;LI Qiaozhen(College of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang,China)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318

出　　处：《力学与实践》2018年第6期666-670,682,共6页Mechanics in Engineering

基　　金：国家自然科学基金资助项目(51674088)

摘　　要：半铰接柔性钻具的载荷传递规律直接影响超短半径水平井钻进的成功率。为此,首先推导出半铰接柔性钻杆的单元刚度方程并揭示了半铰接柔性钻杆的弯矩传递规律;然后,采用理论分析与数值模拟相结合的方法,验证了半铰接柔性钻杆有限元模型的正确性;最后,建立造斜段半铰接柔性钻具力学模型,对不同井眼曲率半径下半铰接柔性钻具的载荷传递规律进行研究。结果表明:井深位置相同时,井底扭矩值随曲率半径的增加而增大;半铰接柔性钻杆未锁死时,柔性钻杆不传递弯矩且井底扭矩波动较大,相关研究成果为柔性钻具的设计提供理论依据。The load transfer law of the semi articulated flexible drilling tool directly affects the drilling in ultra short radius horizontal wells. In this paper, firstly, the element stiffness equation is deduced and the bending moment transfer rule of the semi articulated flexible drill is obtained. Then, combining the theoretical analysis and the numerical simulation, the semi articulated flexible drill rod model is verified. Finally, the semi articulated flexible drill mechanical model is established in the build section and the load transfer under different borehole curvature radius conditions is discussed. The analysis results show that with the same well depth, with the increase of the radius of curvature, the bottom hole torque value increases, when the semi articulated flexible drill rod is not locked, the semi articulated flexible drill rod does not transfer the bending moment and increase the large fluctuate torque at the bottom hole . The research results provide a theoretical basis for the design of flexible drilling tools.

关 键 词：半铰接 柔性钻具 载荷 传递规律 

分 类 号：TE951[石油与天然气工程—石油机械设备]