摘要
喷嘴是水力水平钻孔设备的核心元件,改善其结构有利于提高低渗透油气资源开采的施工效率。因此基于计算流体动力学(CFD)技术,分析尾部流道结构参数对射流流场的影响,得出以下结论:尾部流道数N=6、倾角α满足15°<α<30°,喷嘴出口直径d=1.4mm时,喷嘴的破岩和排屑性能较好;合理设计N和d,有利于实现喷嘴自推进和射流破岩两项功能;合理设计α,能有效改善尾部流道的磨损情况,延长喷嘴使用寿命。
The nozzle is the core component of a hydraulic horizontal drilling equipment,and optimizing its structure is crucial for helping to improve the construction efficiency of exploiting low permeability oil and gas resources.Based on the computational fluid dynamics（CFD）approach,we studied the effects of the structural parameters of the tail flow（evenly distributed on the end of the nozzle）on the jet flow field.The results show that：when the number of the tail flow（N）is 6,with an angle（α）between 15°and 30°and a diameter（D）of 1.4mm,the nozzle exhibits good performance on the rock fragmentation and discharge;the reasonable design of Nand Dcontributes to implementing the nozzle propulsion and the rock destruction by jet;the reasonable design of the jet nozzle angleαcontributes to effectively reducing the abrasion of the jet nozzle and extending its service life.
出处
《高压物理学报》
CAS
CSCD
北大核心
2016年第4期328-334,共7页
Chinese Journal of High Pressure Physics
基金
中国石油2008年重点项目(2008C-2800)
关键词
计算流体动力学
水力喷射钻孔
尾部流道
喷嘴
数值模拟
computational fluid dynamics
hydraulic jet drilling
tail flow
nozzle
numerical simulation
