| 孔底流场和温度场数值模拟与试验研究——以取心孕镶金刚石钻头为例 |
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| 引用本文： | 刘宝昌,曹鑫,计胜利,韩哲,赵新哲,李思奇. 孔底流场和温度场数值模拟与试验研究——以取心孕镶金刚石钻头为例[J]. 金刚石与磨料磨具工程, 2018, 38(5): 33-38. DOI: 10.13394/j.cnki.jgszz.2018.5.0007 |
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| 作者姓名： | 刘宝昌 曹鑫 计胜利 韩哲 赵新哲 李思奇 |
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| 作者单位： | 1. 吉林大学 建设工程学院, 长春 130000;2. 国土资源部 复杂条件钻采技术重点实验室, 长春 130000;3. 吉林大学 超硬材料国家重点实验室, 长春 130012 |
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| 基金项目： | 中国国家自然科学基金“硬岩钻探用金刚石复合片的仿生结构设计及强韧化机理”（No.41572357）。 |
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| 摘 要： | 为提高金刚石钻头的钻进效率，采用数值模拟与试验的方法研究孕镶金刚石钻头孔底流场与温度场，以合理设计钻头结构，保证钻进过程中钻头具有良好的冷却和排屑能力，避免钻头底唇面温度上升过高造成其非正常磨损。结果表明:流场产生的横向压力对转向面水口壁的压力破坏作用较大；钻头与岩石接触面温度变化与水口数目有关，水口过多会导致单个水口的钻井液流量减少，降低水口处的热传导效率，冷却效果不足，从而造成钻头磨损。
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| 关 键 词： | 数值模拟 孕镶金刚石钻头 流场 温度场 钻头设计 |
Simulation and experimental research on flow field andtemperature field of diamond impregnated drill bit |
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| LIU Baochang,CAO Xin,JI Shengli,HAN Zhe,ZHAO Xinzhe,LI Siqi. Simulation and experimental research on flow field andtemperature field of diamond impregnated drill bit[J]. Diamond & Abrasives Engineering, 2018, 38(5): 33-38. DOI: 10.13394/j.cnki.jgszz.2018.5.0007 |
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| Authors: | LIU Baochang CAO Xin JI Shengli HAN Zhe ZHAO Xinzhe LI Siqi |
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| Affiliation: | 1. College of Construction Engineering, Jilin University, Changchun 130000, China;2. Key Laboratory of Drilling and Exploitation Technology in Complex Conditions ofMinistry of Land and Resources, Changchun 130000, China;3. State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China |
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| Abstract: | In order to improve the drilling efficiency of diamond drill bits, the bit structure is reasonably designed to ensure that the bit has a good cooling and chip removal ability during the drilling process, so as to avoid abnormal wear caused by excessive rise of the temperature at the bottom lip of the bit. Numerical simulation and experimental research are used to study the distribution of flow field and temperature field at the bottom of the impregnated diamond drill bit. The results show that the lateral pressure generated by the flow field has a great effect on the pressure destruction of the nozzle wall. According to numerical simulation and drilling tests, the temperature of the contact surface between the drill and the rock is related to the number of nozzles but excessive nozzles will decrease the flow rate of drilling fluid in a single nozzle and thus decrease the heat transfer efficiency at the nozzle. Therefore, the cooling effect is reduced and the drill bit wears fast. |
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