砾岩层PDC切削齿优选试验  

Experimental study on optimization of PDC cutting teeth for conglomerate layer

作　　者：程书婷 王红波[1] 纪慧 蔡茂盛 李赛 CHENG Shuting;WANG Hongbo;JI Hui;CAI Maosheng;LI Sai(School of Petroleum Engineering,Yangtze University,Wuhan 430000,China)

机构地区：[1]长江大学石油工程学院,武汉430000

出　　处：《金刚石与磨料磨具工程》2023年第1期43-48,共6页Diamond & Abrasives Engineering

摘　　要：为了在砾岩层中获得更好的钻进效果,需要对砾岩层用PDC钻头切削齿的齿形和后倾角进行优选。对普通平面齿、锥形齿和斧形齿在砾岩岩样中进行单齿破岩试验,再对优选出的斧形齿进行仿真分析,优选斧形齿的最佳齿面角度,再与普通平面齿进行切削模拟,验证试验结果。结果表明:斧形齿在砾岩层中切削效率最高,受力最稳定;齿面角度为140°的斧形齿在砾岩中钻进效果更好,当其配合30°后倾角时,切削效率最高。In order to obtain better drilling effect in the conglomerate layer,it is necessary to optimize the tooth shape and caster angle of PDC bit for the conglomerate layer.Single tooth rock breaking experiments are conducted on ordinary plane teeth,conical teeth and axe teeth in the conglomerate rock sample.Then the simulation analysis is conducted on the optimized axe teeth to optimize the optimal tooth surface angle of axe teeth.And the cutting simulation is conducted with ordinary plane teeth to verify the experimental results.The results show that the axe tooth has the highest cutting efficiency and the most stable stress in the conglomerate layer;the drilling effect of 140°axe tooth in conglomerate is better;and the cutting efficiency is the highest when 140°axe teeth are matched with 30°caster angle.Therefore,when optimizing the cutting tools for the conglomerate layer,it is necessary to reasonably select the teeth according to the formation characteristics.When applying axe teeth,in order to achieve high cutting efficiency,it is necessary to optimize the combination of tooth surface angle and caster angle.

关 键 词：砾岩 PDC切削齿 齿形优选 异型齿 ABAQUS 

分 类 号：TQ164[化学工程—高温制品工业] TG74[金属学及工艺—刀具与模具]