Screw drilling tool
LI WEIJUN, CHEN DEZHONG, WANG LI, FANG YOUXIANG, WANG JIANQIANG, CHEN JIAN, JING SHENHUAI, CHEN HONGYAN, DOU XUQIAN, HONG JIANJUN, HUANG HANJING, TANG XUEZHONG
Year of Publication 04.08.2023
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Year of Publication 04.08.2023
Patent
Hole bottom grouting device, system and method for sealing deep hole in underground coal mine
JIN DAN, ZHANG JINBAO, WANG LI, YAO NINGPING, DOU XUQIAN, HUANG HANJING, LI HAO, WEI HONGCHAO
Year of Publication 02.09.2022
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Year of Publication 02.09.2022
Patent
Screw drilling tool
LI WEIJUN, CHEN DEZHONG, WANG LI, FANG YOUXIANG, WANG JIANQIANG, CHEN JIAN, JING SHENHUAI, CHEN HONGYAN, DOU XUQIAN, HONG JIANJUN, HUANG HANJING, TANG XUEZHONG
Year of Publication 09.06.2023
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Year of Publication 09.06.2023
Patent
Blowout prevention and dust drilling slag treatment system for broken soft coal gas dynamic directional drilling
WANG LEI, ZHANG JIE, ZHANG YAZHOU, HUANG HANJING, TIAN HONGLIANG, YUE YANPENG, MA QIANG, CHEN TIANZHU
Year of Publication 06.05.2022
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Year of Publication 06.05.2022
Patent