基于LS-DYNA的潜孔钻头仿真分析与布齿优化设计  

Simulation analysis on the downhole bit based on LS-D YNA and optimization of tooth distribution

作　　者：黄志强[1] 宋嘉宁[1] 李琴[1] 范永涛[1] 刘少彬 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中石油东方地球物理公司物资装备部

出　　处：《矿山机械》2009年第5期14-17,共4页Mining & Processing Equipment

基　　金：中国石油天然气集团公司科技攻关项目"物探钻具失效分析及试验研究"(部415);中国石油天然气集团公司创新基金项目(编号:3-6)的部分研究成果

摘　　要：以现场实际应用的QF-Ⅱ型潜孔钻头为原型,利用显式动力学分析软件LS-DYNA建立潜孔钻头与岩石的互作用模型,对潜孔钻头的井底破岩模式进行仿真分析。通过原型钻头冲击旋转破碎岩石的仿真研究认为:从结构上看,现场原型钻头的中间牙齿分布不合理。因此,在原型钻头端面布齿的基础上添加一颗硬质合金齿,可以提高钻头单次破岩量,进而提高钻头的破岩效率和机械钻速,并可以减少钻头失效的几率,提高钻头使用寿命,为确定钻头的最优布齿方案提供了理论依据。Taking the QF-Ⅱ downhole bit as a prototype, and using the dynamic analysis software LS- ID YNA, an interactive model of the bit and the rock is established and the underground rock- breaking simulation is analyzed for downhole bits. It comes to a conclusion. for structure, the middle tooth distribution of the site prototype bit is unreasonable. Therefore, based on the transverse tooth distribution of the prototype bit, adding one carbide tooth can increase single rock-breaking volume, rock-breaking efficiency and drilling rate, reduce the probability of the tooth failure, prolong the bit life and provide the theoretical basis for the optimal tooth distribution.

关 键 词：潜孔钻头 LS-DYNA 仿真 破岩 

分 类 号：TE21[石油与天然气工程—油气井工程]