新型射流振荡减摩阻工具设计及内部流场特性数值模拟分析与实验验证  

Design of a new jet oscillation friction reducing tool and the numerical simulation analysis and experimental testing on its internal flow field characteristics

作　　者：田家林[1] 何虹志 杨琳[1] 杨应林[1] 宫学成 胡志超[1] 李居瑞 TIAN Jialin;HE Hongzhi;YANG Lin;YANG Yinglin;GONG Xuecheng;HU Zhichao;LI Jurui(School of Mechanical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;CNOOC Offshore Oil Engineer(Qingdao)Ltd.,Qingdao,Shandong 266520,China)

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]中海油海洋石油工程(青岛)有限公司,山东青岛266520

出　　处：《中国海上油气》2020年第1期125-133,共9页China Offshore Oil and Gas

基　　金：“十三五”国家科技重大专项“大型油气田及煤层气开发(编号:2016ZX05038)”部分研究成果

摘　　要：为了解决井下减摩阻工具结构复杂、易受地层环境影响的问题,设计了新型射流振荡减摩阻工具,并对该工具内部流场特性进行了数值模拟分析,结果表明:新型射流振荡减摩阻工具射流短节内部流体存在附壁与切换现象;随着入口流速的增加,射流短节振荡室内流体流动状态从无规则变为规则的旋流流动,当入口流速继续增大则转变为无规则流动状态;工具稳定工作后,分流中心点处压力呈现周期性变化。实验测试结果与数值模拟分析结果较为吻合,验证了射流振荡减摩阻工具结构设计的合理性和可靠性。本文研究结果可为射流振荡减摩阻工具结构优化设计提供参考。In order to solve the problems of the complex structure of downhole friction reducing tool and its susceptibility to formation environment,a new jet oscillation friction reducing tool was designed,and numerical simulation analysis and experimental verification were carried out to study the internal flow field characteristics of this tool.The results show that the wall attachment and switching of fluids inside the jet sub of this jet oscillation friction reducing tool are observed;as the inlet velocity increases,the state of fluid flow in the oscillation chamber of jet sub changes from random flow into regular swirling flow.When the flow rate continues to increase,it will change into an irregular flow.Once the tool works stably,the pressure at the shunt center point shows a periodical change.The experimental results are in good agreement with the results of numerical simulation analysis,which verifies the rationality and reliability of the structural design of this jet oscillation friction reducing tool.The research results in this paper can provide a reference for the optimal structural design of jet oscillation friction reducing tool.

关 键 词：射流振荡减摩阻工具 射流短节 流场特性 数值模拟 实验研究 

分 类 号：TE921.2[石油与天然气工程—石油机械设备]