牙轮钻头牙齿磨损的数值模拟  

Numerical Simulation of Roller Bit Tooth Wear

作　　者：邓嵘[1] 李向东 丰波[1] 邱顺佐 李孟华 

机构地区：[1]西南石油大学机电工程学院,成都610500

出　　处：《地质科技情报》2017年第5期222-227,共6页Geological Science and Technology Information

基　　金：四川省科技支撑计划"材料的高效切削及输送技术研究"(2015GZX0159)

摘　　要：采用拉宾诺维奇磨粒磨损模型,通过实验确定了模型中牙齿磨粒磨损系数Kε。运用有限元软件建立了牙轮钻头与岩石互作用模型。用网格重划分法和并行计算技术解决了岩石网格变形大、求解速度慢等问题。分析了3种齿形的牙齿磨损、牙齿磨损形貌,并与现场实验钻头磨损情况进行了对比。结果表明所建立的有限元模型能比较准确地预测牙齿寿命及其磨损形貌;探索了机械钻速、转速和岩石与牙齿磨损量之间的关系,为合理选择钻头型号、推荐钻井参数提供了依据。The Rabinowica abrasive wear model is used which includes tooth abrasive wear coefficient Kε obtained through the experiment. The model of roller bit and rock interaction is established by using the finite element software. By redrawing the grid points system and parallel computing technology large rock morphing and slow solving speed are solved. Three kinds of tooth profile and morphology of tooth wear are analyzed and compared with the field experimental roller bit wear. The results show that finite element model can accurately predict the life of tooth and wear morphology. The relationship between rate of penetration, rotary speed , rock and tooth wear is explored. The development of relationship can provide basis for reasonable selecting roller bit model and recommending drilling parameters.

关 键 词：数值模拟 磨粒磨损 磨粒磨损系数Kε 牙齿寿命 磨损量 

分 类 号：P634.41[天文地球—地质矿产勘探]