潜孔钻头破岩机理仿真研究  

EMULATION OF THE ROCK FRAGMENTATION PRINCIPLE OF THE PERCUSSION-ROTARY DRILL BIT

作　　者：宋嘉宁[1] 李琴[1] 谭力[1] 刘成[2] 魏振强[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]新疆石油管理局供热公司

出　　处：《西南石油大学学报（自然科学版）》2007年第S2期113-115,178,共4页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：利用ANSYS/LS-DYNA显式动力学分析软件建立潜孔钻头与岩石的互作用动力学模型,对潜孔钻头的破岩过程进行仿真分析,通过对破岩总体过程、钻头的应力、破碎坑的形状和分布及钻头的位移等四个方面的分析,完整地描述潜孔钻头的破岩机理,认为钻头破碎岩石的过程分为三个阶段:中间齿破碎岩石,形成破碎坑阶段;边齿破碎岩石,形成破碎坑阶段;钻头的反弹阶段。在钻头侵入岩石的过程当中,钻头既有轴向的位移,也有横向的位移。破岩过程中,牙齿3峰值最大,最容易发生破坏。By means of dynamic analysis software ANSYS/LS-DYNA,a kinetic model that contains the rock and the bit to analyze the process of the rock-breaking is buil.Through analyzing the process of the rock-breaking,the stress of the bit,the shape and the distribution of the fragmentary pits and the displacement of the cutters and the rock fragmentation principle are described completely and some conclusions is obtained,in the process of the rock-breaking,there are three phases, center teeth breaks the rock to form the breaking pit,side teeth breaks the rock to form the breaking pit,the rebounding phase of the pit.In the process of the bit invading the rock,the bit has both longtitude displacement and latitude displacement.In the process of the rock-breaking,he stress of the bit tooth three is maximal,and apt to be destroyed.

关 键 词：冲旋钻井 潜孔钻头 ANSYS/LS-DYNA 仿真 破岩机理 

分 类 号：TE21[石油与天然气工程—油气井工程]