摘要
为适应当前复杂深部地层的钻井需求,结合商用激光技术迅速广泛发展及与能源开发行业的融合趋势,展开了激光与机械联合破岩原理试验研究并研制了原理试验钻具。该钻具采用了实施性和经济性较好的气体保护隔离方案。针对原理试验钻具气路设计的合理性,采用CFD-DEM方法进行流固耦合分析,验证了现有试验用空气压缩机所供高速压缩气流对促进钻屑的循环及保护光学镜组模块的作用。仿真分析结果表明:当直径为2-6 mm随机分布的岩屑颗粒以均值为20 m/s正态分布速度逸出时,相对无气体作用工况,当有0.6 MPa高速压缩气流作用于试验钻具后,5 s结束时刻环空返屑效率提高2倍,阻碍激光传输的岩屑颗粒减少1/3,证明该气路设计对加速岩屑循环和保护光学元件具有积极作用。研究方法与结果对激光破岩中光学模块保护及岩屑移运相关研究具有一定的参考价值。
In order to meet the current drilling needs of complex deep strata,combined with the rapid and extensive development of commercial laser technology and the trend of its integration with the energy development industry,this article carried out the experimental study on the principle of rock breaking by laser and mechanical combination,and designed the principle test drilling tool.The drilling tool adopted a gas shield isolation scheme with good implementation and economy.For the rationality of the gas path design of the principle test drilling tool,the article used the CFD-DEM method to conduct fluid-solid coupling analysis to verify the role of the high-speed compressed air supplied by the existing air compressor in promoting the circulation of drilling cuttings and protecting the optical lens module.The simulation analysis results show that when the cuttings particles of 2-6 mm diameter with a random distribution escape at a normal distribution speed of 20 m/s,there is no gas action;when the 0.6 MPa high-speed compressed air acts on the test drilling tool,the annular cuttings return efficiency is increased by 2 times at 5 s,and the cuttings particles hindering the laser transmission are reduced by 1/3,proving that the gas path design has a positive effect on accelerating the cuttings circulation and protecting the optical elements.The study methods and results have certain reference value for the research of optical module protection and cuttings transport in the laser rock breaking process.
作者
左永强
惠坤亮
易畅
闫静
吴小雄
王德贵
王前敏
Zuo Yongqiang;Hui Kunliang;Yi Chang;Yan Jing;Wu Xiaoxiong;Wang Degui;Wang Qianmin(CNPC National Petroleum Drilling Equipment Engineering Technology Research Center Company Limited;CNPC Baoji Oilfield Machinery Co.,Ltd.;Sichuan BOMCO Petroleum Drill Bit Co.,Ltd.)
出处
《石油机械》
北大核心
2021年第9期1-8,共8页
China Petroleum Machinery
基金
中国石油天然气集团有限公司“十三五”后两年重大科技项目“激光、超声波与机械联合破岩方法研究”(2019A-3908)
国家油气钻井装备工程技术研究中心计划开发项目“激光与机械联合破岩成孔技术研究”(新2019-12)。
