煤矿井下套管切割刀具选型及对比分析
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摘要
为了解决煤层段注浆套管影响煤层回采的问题,采取对煤层段注浆套管进行分段切割。在研发设计套管切割钻头的基础上,选取了PDC切割刀具、热压金刚石切割刀具和电镀金刚石切割刀具3种不同工艺类型的切割刀具在赵固一矿对壁厚4.5mm的双层套管(套管规格Φ108mm、Φ127 mm)进行了2组对比切割试验。试验结果表明:3种不同工艺类型的切割刀具都能够实现双层套管一次性切割,其中,PDC切割刀具具有较高的切割速度,但寿命偏低;热压金刚石切割刀具和电镀金刚石切割刀具具有较高的寿命,电镀金刚石切割刀具切割效率更高,硬度对两种金刚石切割刀具影响很大。
In order to solve the problem that grouting casing in coal seam affects coal mining, the technical method of sectional cutting of grouting casing in coal seam was adopted. Based on the research and design of casing cutting bit, three different cutting tools, that is, PDC cutting tool, hot-pressed diamond cutting tool and electroplated diamond cutting tool were selected in Zhaogu No. 1 Coal Mine where two sets of comparative cutting tests were carried out for 4.5 mm thick double-layer casing(casing specifications Φ108 mm and Φ127 mm). The experimental results show that all three kinds of cutting tools can achieve one-time cutting of double-layer casing, among which PDC cutting tools have higher cutting speed but lower life; hot-pressed diamond cutting tools and plated diamond cutting tools have higher life, and plated diamond cutting tools have higher cutting efficiency. Hardness has a great influence on the two kinds of diamond cutting tools.
In order to solve the problem that grouting casing in coal seam affects coal mining, the technical method of sectional cutting of grouting casing in coal seam was adopted. Based on the research and design of casing cutting bit, three different cutting tools, that is, PDC cutting tool, hot-pressed diamond cutting tool and electroplated diamond cutting tool were selected in Zhaogu No. 1 Coal Mine where two sets of comparative cutting tests were carried out for 4.5 mm thick double-layer casing(casing specifications Φ108 mm and Φ127 mm). The experimental results show that all three kinds of cutting tools can achieve one-time cutting of double-layer casing, among which PDC cutting tools have higher cutting speed but lower life; hot-pressed diamond cutting tools and plated diamond cutting tools have higher life, and plated diamond cutting tools have higher cutting efficiency. Hardness has a great influence on the two kinds of diamond cutting tools.
引文
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[2]李见波.双高煤层底板注浆加固工作面突水机制及防治机理研究[D].北京：中国矿业大学(北京)，2016.
[3]陈新明.大埋深复杂水文地质条件工作面防治水技术研究[D].北京：中国矿业大学(北京)，2012.
[4]陆文祥，刘毅华，李文鑫.小口径割管器的设计与应用[J].中国煤炭地质，2009,21(2):65–66.LU Wenxiang,LIU Yihua,LI Wenxin. Design and application of small diameter pipe cutter[J]. Coal Geology of China,2009,21(2):65–66.
[5]李占锋，张佳俐，张金来.一种新型割管器的设计与应用[J].探矿工程(岩土钻掘工程)，2012,39(3):27–29.LI Zhanfeng,ZHANG Jiali,ZHANG Jinlai. Design of new pipe cutter and the application[J]. Exploration Engineering(Rock&Soil Drilling and Tunneling),2012,39(3):27–29.
[6]潘光明，郭冬兰，潘东懿.钻孔割管器的研究与应用[J].山东煤炭科技，2006(2):53–54.PAN Guangming,GUO Donglan,PAN Dongyi. Research and application of drilling cutter[J]. Shandong Coal Science and Technology,2006(2):53–54.
[7]杨行，孙巧雷，冯定，等.用于深水套管切割的水力式内切割装置设计[J].科学技术与工程，2018,18(25):45–50.YANG Hang,SUN Qiaolei,FENG Ding,et al. Design of hydraulic internal cutting device for deep water casing cutting[J].Science Technology and Engineering,2018,18(25):45–50.
[8]陈瑶，秦浩智，谭帅.深水井口系统切割回收工具设计研究[J].石油机械，2016,44(7):70–75.CHEN Yao,QIN Haozhi,TAN Shuai. Resign and research on cutting and retrieving tool of deepwater subsea wellhead system[J]. China Petroleum Machinery,2016,44(7):70–75.
[9]冯定，黄锴，王鹏，等.海洋弃井套管切割作业偏心工况分析[J].中国海上油气，2017,29(2):103–108.FENG Ding,HUANG Kai,WANG Peng,et al. Analysis of the eccentric scenario in casing-cutting operations for offshore well abandonment[J]. China Offshore Oil and Gas,2017,29(2):103–108.
[10]伍涛，张朋，张小军.煤矿井下割管钻具结构设计及加工工艺[J].煤矿安全，2018,49(12):92–95.WU Tao,ZHANG Peng,ZHANG Xiaojun. Structure design and processing technology of pipe cutting pipe tools in the coal mine[J]. Safety in Coal Mines,2018,49(12):92–95.
[11]张朋，王传留，伍涛.电镀金刚石刀具在煤矿井下套管切割中的应用[J].超硬材料工程，2018,30(5):38–42.ZHANG Peng,WANG Chuanliu,WU Tao. Application of electroplated diamond cutting tools in multi-layer casing cutting in coal mine[J]. Superhard Material Engineering,2018,30(5):38–42.
[12]孙毓超.金刚石工具与金属学基础[M].北京：中国建材工业出版社，1999.
[13]杨俊德.金刚石钻头和金刚石锯片磨损机理、设计及性能测试研究[D].长沙：中南大学，2004.
[14]方小红，潘秉锁，张丽.电镀金刚石复合齿锯片的研究[J].金刚石与磨料磨具工程，2003,23(5):40–42.FANG Xiaohong,PAN Bingsuo,ZHANG Li. Study on electorlated saw blade of composite diamond segment[J]. Diamond&Abrasives Engineering,2003,23(5):40–42.
[15]刘定福.复合电镀金刚石圆锯片工艺[J].材料保护，2000,33(7):21.LIU Dingfu. Composite electroplating of diamond circular saw blades[J]. Materials Protection,2000,33(7):21.
[16]李云东，江辉，李根生，等.电镀金刚石工具中新型镀层的研究[J].材料保护，2002(12):31–32.LI Yundong,JIANG Hui,LI Gensheng,et al. New electroplating coating for diamond tools[J]. Materials Protection,2002(12):31–32.
[17]李超群.电镀金刚石钻头胎体材料的选择[J].超硬材料与工程，1999(2):19.LI Chaoqun. Selection of matrix material for electroplated diamond bit[J]. Superhard Material Engineering,1999(2):19.
[18]田增泰.金刚石链锯切割混凝土的研究[J].科技创新与应用，2018(8):191–192.TIAN Zengtai. Study on cutting concrete with diamond chain saw[J]. Technology Innovation and Application, 2018(8):191–192.