固液两相流粒子冲蚀钻头内流道磨损
Bit internal flow passage erosion by solid-liquid two-phase flow impact of particles
摘要
Abstract
In order to identity the mechanism of bit internal flow passage erosion by solid-liquid two-phase flow impact of particles, the discrete phase model (DPM) was applied to establish the physical model of bit internal flow passage erosion, and the effects of particle parameters on the bit internal flow passage erosion were obtained. Furthermore, the indoor experiments were carried on to verify the validity of the DPM model. The results show that the bit internal flow passage erosion of particles mainly distributes on the contraction surface of bit internal flow passage, and the closer to the bit center axis, the higher the erosion rate is. The average erosion rate of the internal flow passage increases with the increase of the inlet velocity of particles. As the particle diameter increases, the average erosion rate of the internal flow passage decreases first and starts to increases, and then tends to be stable. The minimum average erosion rate is obtained with a particle diameter of 2.0 mm. Furthermore, the average erosion rate of the internal flow passage increases linearly with an increase of the particle volume fraction. When the inlet angle is 50°, the maximum average erosion rate of the internal flow passage appears. In addition, the average erosion rate of the internal has been less affected by the pressure. The erosion loss of the internal flow passage decreases by 0.80% after 100 h erosion experiment.关键词
固液两相流/内流道磨损/离散相模型/粒子参数/钻头Key words
solid-liquid two-phase flow/bit internal flow passage erosion/discrete phase model (DPM)/particle parameters/drilling bit分类
能源科技引用本文复制引用
赵健,张贵才,徐依吉,王瑞和,周卫东,韩烈祥..固液两相流粒子冲蚀钻头内流道磨损[J].中南大学学报（自然科学版）,2018,49(5):1228-1236,9.基金项目
第58批中国博士后基金资助项目(2015M582167) （2015M582167）
山东省自然科学基金资助项目(ZR2016EL10) （ZR2016EL10）
中央高校基本科研业务费专项资金资助项目(16CX02061A) （16CX02061A）
青岛市应用基础研究项目(16-5-1-37-jch) （16-5-1-37-jch）
中石油科学研究与技术开发项目(2015F-1801) （2015F-1801）
山东省重点研发计划项目(GG201709250112)(Project(2015M582167)supported by the 58th China Postdoctoral Science Foundation （GG201709250112）
Project(ZR2016EL10)supported by the Natural Science Foundation of Shandong Province （ZR2016EL10）
Project(16CX02061A)supported by the Fundamental Research Funds for the Central Universities （16CX02061A）
Project(16-5-1-37-jch)supported by the Qingdao Applied Basic Research Program （16-5-1-37-jch）
Project(2015F-1801)supported by the CNPC Scientific Research and Technology Development Program （2015F-1801）
Project(GG201709250112)supported by the Key Research and Development Plan of Shandong Province) （GG201709250112）
