冲旋钻头破岩机理仿真研究  

EMULATION STUDY ON ROCK-BREAKING MECHANISM OF PERCUSSION-ROTARY BIT

作　　者：黄志强[1] 范永涛[1] 魏振强 谭力 卜燕[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中国石油安全环保技术研究院,北京100083 [3]中国石油川庆钻探国际工程公司,四川成都610000

出　　处：《西南石油大学学报（自然科学版）》2010年第1期148-150,共3页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中国石油天然气集团公司资助课题"物探钻具失效分析及试验研究"(部415)

摘　　要：介绍了冲旋钻井中冲旋钻头与岩石互作用有限元模型的建立过程,并对冲旋钻头在冲击旋转和单纯冲击载荷作用下的破岩过程进行了计算机仿真研究,描述了冲旋钻头破岩过程,求出了相应的钻头破碎岩石的深度、体积时程关系对比曲线,揭示了冲旋钻头的破岩机理——钻头在冲旋作用下破碎岩石的过程可分为4个阶段、钻头破碎岩石深度主要取决于冲击作用而与旋转作用关系不大、破岩体积在冲旋作用下比单纯冲击载荷作用下要大一倍左右,为冲旋钻头在石油工业中的进一步推广应用提供了理论依据。The process of establishing the finite element model of the bit-rock interaction in the percussion-rotary drill is introduced.What's more,the process of the rock-breaking by the percussion-rotary bit under rotating impact and simple impact load is emulated with computer,then the process is described herein.The related depth-time and volume-time contrasting curves when the bits break rocks are obtained,and the rock-breaking mechanism of the percussion-rotary bit is concluded.The process of the rock-breaking under rotating impact can be divided into four phases,the depth of the rock-breaking is mainly decided by impact effect but not the effect of rotary,rock-breaking volume under rotating impact is about twice as large as that under simple impact load.Therefore,the theoretic foundations for the further use of percussion-rotary bit in the oil industry are provided.

关 键 词：计算机仿真 冲旋钻井 冲旋钻头 破岩机理 

分 类 号：TE921[石油与天然气工程—石油机械设备]