扭转冲击钻井工具的工作特性

Operating characteristics of torsional impact drilling tool

汪伟 柳贡慧 李军 查春青 黄涛1

中国石油大学（北京）石油工程学院，北京 102249 北京工业大学，北京 100124

College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China Beijing University of Technology, Beijing 100124, China

扭转冲击钻井工具是近年来应用较为广泛的提速工具，它可以有效地消除PDC钻头的黏滑振动现象，提高深部地层的机械钻速。在分析工具结构与工作原理的基础上，文中建立了摆锤、换向器的运动数学模型，研究了摆锤、换向器的运动特性，并对工具的冲击性能参数随钻井液排量和节流喷嘴直径的变化规律进行了计算。结果表明：摆锤和换向器在不同阶段的运动均为非线性的；工具的冲击功和冲击频率随钻井液排量的增加而增大，随节流喷嘴直径的增大而减小。研究结果对于扭转冲击钻井工具的设计与应用具有重要的借鉴意义。

Being a new type of drilling tool, torsional impact drilling tool is widely used to eliminate stick-slip vibration of PDC bit and enhance the ROP of deep formation recently. Based on the analysis of the structure and operating principle of the tool, the movement characteristic model of hammer and commutator was established in this paper, and the running characteristics of hammer and commutator were studied. The relationships among the tool performance parameters and the drilling mud flow rate and throttle nozzle diameter were calculated. The results show that the motion of the hammer and the commutator are nonlinear at different stages. The impact energy and the impact frequency of torsional impact drilling tool increase with the increase of drilling mud flow rate, but decrease with the increase of nozzle diameter. The research results provide important reference for the design and application of torsional impact drilling tools.

10.6056/dkyqt201903025