中心射流泵降压性能参数敏感性分析  

Sensitivity Analysis of Pressure Reduction Performance Parameters of Central Jet Pumps

作　　者：谢仁军 任美鹏 王隽妍 石昌帅[2] 赵渊昊 程飞龙 XIE Renjun;REN Meipeng;WANG Junyan;SHI Changshuai;ZHAO Yuanhao;CHENG Feilong(CNOOC Research Institute Company Limited,Beijing 100027,China;School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]中海油研究总院有限责任公司,北京100027 [2]西南石油大学机电工程学院,成都610500

出　　处：《石油矿场机械》2024年第4期10-18,共9页Oil Field Equipment

基　　金：国家自然科学基金(52174210);南充市-西南石油大学市校科技战略合作项目(SXHZ049)。

摘　　要：为分析射流泵结构参数对井下环空钻井液压降的影响,应用CFD仿真软件对中心射流泵的不同结构参数产生的降压效果进行仿真分析。结合实际工况模拟了射流泵的喉管长度、喉管直径、喷嘴直径、喷嘴角度四个关键结构参数以及钻井液密度和排量对压降影响的敏感性。同时,运用CFD-DPM方法对射流泵进行了冲蚀分析,给出冲蚀较大的区域。研究结果表明:喷嘴直径相比其他三种参数对环空压降影响较显著,喉管长度、喉管直径、喷嘴角度对环空压降影响较小;钻井液排量相对与钻井液密度对射流泵的降压效果影响更为显著;冲蚀较大区域主要出现在射流泵入口处、射流泵弯管拐角处、喷嘴缩径处。研究结果可为用于井下起抽吸降压作用的中心射流泵的结构尺寸设计提供参考。To analyze the influence of jet pump structural parameters on the hydraulic drop of annular wells,CFD simulation software was used to simulate and analyze the pressure reduction effect of different structural parameters of the central jet pump.Four key structural parameters,including pipe length,pipe diameter,nozzle diameter,and nozzle angle,as well as the sensitivity of drilling fluid density and displacement to pressure drop,were simulated based on actual working conditions.In addition,the erosion analysis of the jet pump is carried out by CFD-DPM method,and the area with large erosion is given.The results show that,compared with the other three parameters,the nozzle diameter has a significant effect on the annular pressure drop,while the pipe length,pipe diameter and nozzle angle have little effect on the annular pressure drop.Compared with drilling fluid density,drilling fluid displacement has a more significant effect on the pressure reduction effect of jet pump.The large area of erosion occurs mainly at the inlet of the jet pump,the corner of the jet pump bend and the nozzle reduction.The research results provide a reference for the structural size design of the central jet pump used for pumping and depressurizing.

关 键 词：射流泵 井下工具 结构尺寸 敏感性 降压 

分 类 号：TE921.2[石油与天然气工程—石油机械设备]