超高压前混合磨料射流切割煤层气弃井套管数值模拟研究
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摘要
针对煤层气开采过程中需对弃井套管进行清除处理问题,基于磨料水射流技术,提出应用超高压前混合磨料射流技术解决此问题,探究其在淹没环境中对射流效果的影响,基于FLUENT软件分析探究喷嘴直径、磨料浓度、射流压力等参数的改变对射流的影响。分析结果表明:在淹没环境中,射流动压值随喷嘴直径增大而增大,势流核长度随喷嘴直径增大而增长且射流延展性更好;磨料浓度增大会小幅度导致射流势流核延展长度增长;在正常的射流压力内,可达到稳定切割套管的效果。
In view of the problem that the abandonment casing should be removed during the CBM mining process, based on the abrasive water jet technology,the application of ultra-high pressure premixed abrasive jet technology was proposed to solve this problem and explored its influence on the jet effect in the submerged environment. Based on FLUENT software,analyzed and explored the influence of the parameters such as nozzle diameter,abrasive concentration and jet pressure on the jet.The analysis results show that in the submerged environment,the jet flow pressure increases with the nozzle diameter,and the potential stream core length increases with the nozzle diameter and the jet ductility is better;the increase of the abrasive concentration will lead to a small increase in the length of the jet potential stream core;within the normal jet pressure,the effect of the stable cutting sleeve can be achieved.
In view of the problem that the abandonment casing should be removed during the CBM mining process, based on the abrasive water jet technology,the application of ultra-high pressure premixed abrasive jet technology was proposed to solve this problem and explored its influence on the jet effect in the submerged environment. Based on FLUENT software,analyzed and explored the influence of the parameters such as nozzle diameter,abrasive concentration and jet pressure on the jet.The analysis results show that in the submerged environment,the jet flow pressure increases with the nozzle diameter,and the potential stream core length increases with the nozzle diameter and the jet ductility is better;the increase of the abrasive concentration will lead to a small increase in the length of the jet potential stream core;within the normal jet pressure,the effect of the stable cutting sleeve can be achieved.
引文
[1]朱玖琳.煤层气弃井套管磨料射流切割技术研究[D].东营：中国石油大学(华东), 2014.
[2]刘浪,杨春敏,韩东太，等.煤矿井下危险环境磨料水射流切割技术探讨[J].煤矿机械, 2003,24(4):29-31.
[3]刘超,刘聪.前混合磨料水射流技术在煤矿井下的应用前景分析[J].煤矿机械, 2016, 37(8):3-6.
[4]熊爱江.磨料射流套管切割技术在深水弃井中的应用[J].中国石油和化工标准与质量, 2018, 38(10):145+148.
[5]刘霄亮,高辉,焦向东，等.基于FLUENT的淹没环境高压水射流数值模拟[J].机械设计与制造, 2016(11):117-120.
[6]曹寒冰.基于FLUENT的前混合磨料射流喷嘴流场的数值模拟[D].淮南：安徽理工大学, 2013.
[7]苗思忠.前混合磨料射流清洗喷嘴内外流场的仿真研究[D].淮南：安徽理工大学, 2017.
[2]刘浪,杨春敏,韩东太，等.煤矿井下危险环境磨料水射流切割技术探讨[J].煤矿机械, 2003,24(4):29-31.
[3]刘超,刘聪.前混合磨料水射流技术在煤矿井下的应用前景分析[J].煤矿机械, 2016, 37(8):3-6.
[4]熊爱江.磨料射流套管切割技术在深水弃井中的应用[J].中国石油和化工标准与质量, 2018, 38(10):145+148.
[5]刘霄亮,高辉,焦向东，等.基于FLUENT的淹没环境高压水射流数值模拟[J].机械设计与制造, 2016(11):117-120.
[6]曹寒冰.基于FLUENT的前混合磨料射流喷嘴流场的数值模拟[D].淮南：安徽理工大学, 2013.
[7]苗思忠.前混合磨料射流清洗喷嘴内外流场的仿真研究[D].淮南：安徽理工大学, 2017.