矩形喷嘴对PDC钻头井底流场影响的研究  

Analysis about influence of PDC rectangular nozzles on bottom flow filed

作　　者：黄奎林[1] 杨迎新[1] 钱雯[1] 黄开华[1] 周建[1] 李振北[2] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中国石油天然气管道局,河北廊坊065000

出　　处：《机械研究与应用》2012年第2期28-30,共3页Mechanical Research & Application

摘　　要：针对PDC钻头的水力能量清洗井底和冷却钻头的作用充分发挥的结构设计问题,先分析了矩形喷嘴的射流特性,得到了射流轴心动压力衰减规律和横向动压力分布规律及横向动压力梯度分布规律,通过CFD仿真软件CFX对PDC钻头井底流场进行了模拟,将矩形喷嘴和圆形喷嘴对比,分析得知喷嘴位置在等速核长度内,矩形喷嘴更有利于清除岩屑和冷却钻头。During hydraulic structure designing of PDC,it is very important to make sure that hydraulic energy plays full function on cleaning bottom hole and cooling bit.This article analyzes the jet behavior of rectangular nozzles.With that knowledge in hand,the rules about dynamic pressure damping in jet axial,dynamic pressure distribution and gradient distribution in jet transverse are obtained.Using CFX,a kind of CFD software,it also contrasts the rectangular nozzle and round nozzle by simulating the flow filed on bottom hole.The results show that it will be helpful in cleaning cuttings and cooling bit when rectangular nozzles are located at the length of cores with equal velocity.

关 键 词：矩形喷嘴 PDC钻头 CFX 数值模拟 

分 类 号：TH12[机械工程—机械设计及理论]