摘要
现有研究采用简化处理增压腔模型或只利用数值模拟仿真水力增压器增压性能,可能导致计算结果不可靠。为此,基于实际钻井工艺要求,设计了利用井下水力能量增压的井下水力增压器。根据增压器的结构和工作原理,建立了增压腔的数学模型和流体域模型,采用Matlab数值模拟和Fluent动网格技术仿真对增压腔的增压特性进行研究,并将两者结果进行对比分析,以验证研究结果的正确性。研究结果表明:增压过程中,活塞运动速度、流体出射速度及有杆增压腔流体压力均随时间延长呈现出先增大后逐渐趋于稳定的规律;随着高压出口直径的减小和低压腔与有杆增压腔有效作用面积比的增大,有杆增压腔内流体压力增大,高压出口处流体出射速度增大,增压器的增压效果越明显;对增压腔结构参数进行优选,当高压出口直径不大于8 mm、低压腔与有杆增压腔的有效作用面积比不小于3.5时,可增强增压器增压效果。研究结果可为增压器的优化设计提供理论支持。
The existing researches use simplified booster cavity model or only use numerical simulation to simulate the boosting performance of hydraulic booster,which may lead to unreliable calculation results.Therefore,based on the actual drilling technology requirements,this article presents a downhole hydraulic booster that uses downhole hydraulic energy to boost pressure;based on the structure and working principle of the booster,the authors firstly built the mathematical model and fluid domain model of the booster cavity;then,used Matlab numerical simulation and Fluent dynamic gridding technique simulation to simulate the boosting performance of the booster cavity,and finally,conducted comparative analysis on their results to verify the correctness of the research results.The research results show that,in the process of boosting,the piston movement speed,the fluid ejection velocity and the fluid pressure of rod booster cavity all increase first and then gradually stabilize with time;as the diameter of the high pressure outlet decreases and the effective action area ratio of the low pressure cavity to the rod booster cavity increases,the fluid pressure in the rod booster cavity increases,the fluid ejection velocity at the high pressure outlet increases,and the boosting effect of the booster is more obvious;after the structural parameters of the booster cavity have been optimized,when the diameter of the high pressure outlet is not larger than 8 mm and the effective action area ratio of the low pressure cavity to the rod booster cavity is not less than 3.5,the boosting effect of the booster can be enhanced.The research results provide theoretical supports for the optimum design of the booster.
作者
黄壮
夏成宇
何宇航
郭良林
冯超
吴霁薇
Huang Zhuang;Xia Chengyu;He Yuhang;Guo Lianglin;Feng Chao;Wu Jiwei(School of Mechanical Engineering,Yangtze University;Department of Physics,School of Engineering and Applied Sciences,Harvard University;East China University of Science and Technology)
出处
《石油机械》
北大核心
2021年第10期99-107,共9页
China Petroleum Machinery
基金
国家自然科学基金项目“深水无隔水管钻井涡动对钻柱动态响应研究”(51405032)
页岩油气国家重点实验室开放基金项目“硬塑性岩层空化射流高频多维冲击破岩机理及应用研究”(20-YYGZ-KF-GC-16)。
