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油气钻井极硬岩层钻头用孕镶齿研究
徐良,刘一波,孙延龙,周劲辉
Study on impregnated teeth for bits in extremely hard rock formation of oil and gas drilling
XU Liang,LIU Yibo,SUN Yanlong,ZHOU Jinhui
粉末冶金工业 . 2021, (04): 105 -109 .  DOI: 10.13228/j.boyuan.issn1006-6543.20190226