气体钻井下部钻柱非线性动力学分析  

The Nonlinear Dynamics Analysis of Bottom Drillstring of Air Drilling

作　　者：肖洲 许期聪 邓虎 余锐 廖兵 郑伟 裴昆 

机构地区：[1]川庆钻探工程公司钻采研究院空气钻井公司,四川广汉618300 [2]长城钻探工程有限公司钻具公司,辽宁盘锦124000

出　　处：《重庆科技学院学报（自然科学版）》2013年第4期119-121,125,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家863计划项目(2006AA06A103)

摘　　要：利用非线性动力学原理,建立以气体为循环介质的下部钻柱―钻头―地层有限元模型,并利用显式New-mark时间积分法计算求解。研究下部钻柱与井壁非线性接触碰撞时产生接触力的特点,分析下部钻柱受到钻压和扭矩的作用后的运动状态,认识下部钻柱危险点的瞬态力学行为以及下部钻柱受载荷后的位移变化规律。Based on nonlinear dynamics theory along with the finite element method,3D finite element numerical model of the bottom drillstring（drill Collar）-bits-formation is established.By way of calculating in explicit Newmark time integration method,the characteristics of contact forces generated when drillstring collided wall are analyzed,movement state of the drillstring is studied when drillstring endured WOB and torque,instant mechanics of dangerous point is studied,and the change laws of displacement when drillstring endured load are achieved.These research results provided theoretical basis for the study of air drilling drillstring dynamics.

关 键 词：气体钻井 钻柱 动力学 

分 类 号：TH113[机械工程—机械设计及理论]