高频脉冲射流振荡腔结构优化及其脉冲振荡效果分析  

Optimization of high-frequency pulsed jet oscillation chamber structure and analysis of its pulse oscillation effects

作　　者：杜玉昆 岳伟民[3] 刘光杰 王刚[4] 聂亭亭[4] 唐旸 兰晶晶[4] 赵博[6] DU Yukun;YUE Weimin;LIU Guangjie;WANG Gang;NIE Tingting;TANG Yang;LAN Jingjing;ZHAO Bo(State Key Laboratory of Deep Oil and Gas,Qingdao 266580,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;Oil&Gas Survey,China Geological Survey,Beijing 100083,China;No.1 Oil Production Plant of Qinghai Oilfield,Haixi 817000,China;No.5 Oil Production Plant of Qinghai Oilfield,Haixi 817000,China;Oil Industry Training Centre,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]深层油气全国重点实验室,山东青岛266580 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中国地质调查局油气资源调查中心,北京100083 [4]青海油田采油一厂,青海海西817000 [5]青海油田采油五厂,青海海西817000 [6]中国石油大学(华东)石油工业训练中心,山东青岛266580

出　　处：《流体机械》2024年第12期64-69,共6页Fluid Machinery

基　　金：山东省自然科学基金项目(ZR2023ME119;ZR2022ME077);油气钻完井技术国家工程研究中心科学研究基金项目(NERCDCT202313)。

摘　　要：针对脉冲射流在深井应用中的局限性问题,设计了一种高频自激脉冲射流发生器,建立了流场分析数学物理模型,采用瞬态流体动力学仿真软件Xflow,分析了其流场压力波动特性,并对结果进行了室内试验验证。结果表明:优选获得的射流发生器腔室结构为腔室宽度61 mm、入口宽度20 mm、模型厚度40 mm,其出口压力波动频率为296 Hz,满足了300 Hz左右的设计要求;将该套优选结构与实际钻头流道相结合,分析发现钻具可以产生高频稳定波动的脉冲射流,振荡腔轴向力振荡频率为276 Hz,钻具压降在5 MPa左右。通过优化脉冲射流发生器结构,获得了稳定高频的流场压力波动,可以进一步提升脉冲射流井底清岩和辅助破岩效果,推动脉冲射流深井提速技术的发展。A high-frequency self-excited pulsed jet generator was designed to address the limitations of pulsed jet applications in deep wells.A mathematical and physical model for flow field analysis was established,and the pressure fluctuation characteristics of the flow field were analyzed using the transient fluid dynamics simulation software Xflow,and the results were validated through indoor experiments.The research results indicate that the optimized jet generator chamber structure has a chamber width of 61 mm,an inlet width of 20 mm,and a model thickness of 40 mm.The outlet pressure fluctuation frequency is 296 Hz,which meets the design requirements of around 300 Hz;By combining the optimized structure with the actual drill bit flow channel,it was found that the tool can generate high-frequency stable fluctuating pulse jets.The oscillation frequency of the axial force in the oscillation chamber is 276 Hz,and the tool pressure drop is around 5 MPa.By optimizing the structure of the pulsed jet generator,stable high-frequency flow field pressure fluctuations were obtained,which can further improve the bottom-hole cuttings cleaning and auxiliary rock breaking effectiveness of pulsed jet,and promote the development of pulsed jet deep well ROP increasing technology.

关 键 词：水力振荡腔 脉冲射流 结构优化 压力波动 频率特性 

分 类 号：O358[理学—流体力学] TN75[理学—力学]