Novel float collar
LIU HECHAO, FANG LIZHI, LIU XUEGUO, GUO XUEYI, GAO XIYI, GUO GUOQIANG, ZHAN QINGWEI, YU KAILI, LI HUAZHAO, LIU YONGXIN, LI ZHENJIANG, MA YUBIN
Year of Publication 16.07.2014
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Year of Publication 16.07.2014
Patent
Novel self-filling float collar
LIU HECHAO, FANG LIZHI, LIU XUEGUO, GUO XUEYI, GAO XIYI, GUO GUOQIANG, ZHAN QINGWEI, YU KAILI, LI HUAZHAO, LIU YONGXIN, LI ZHENJIANG, MA YUBIN
Year of Publication 25.06.2014
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Year of Publication 25.06.2014
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Pressure test device of hydraulic cementing tool and working method
LIU HECHAO, FANG LIZHI, LIU XUEGUO, GUO XUEYI, GAO XIYI, GUO GUOQIANG, ZHAN QINGWEI, YU KAILI, LI HUAZHAO, LIU YONGXIN, LI ZHENJIANG, MA YUBIN
Year of Publication 19.02.2014
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Year of Publication 19.02.2014
Patent
Novel casing head
LI HAILIN, FANG LIZHI, GUO XUEYI, GAO XIYI, GUO GUOQIANG, ZHAN QINGWEI, LI HUAZHAO, YU KAILI, LIU YONGXIN, LI ZHENJIANG, MA YUBIN
Year of Publication 13.02.2013
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Year of Publication 13.02.2013
Patent
Novel float collar float shoe
LIU HECHAO, FANG LIZHI, GUO XUEYI, GAO XIYI, GUO GUOQIANG, ZHAN QINGWEI, LI HUAZHAO, YU KAILI, LIU YONGXIN, MA YUBIN, LI ZHENJIANG
Year of Publication 13.02.2013
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Year of Publication 13.02.2013
Patent
Single-grade clip type casing head
LIU HECHAO, FANG LIZHI, GUO XUEYI, GAO XIYI, GUO GUOQIANG, ZHAN QINGWEI, YU KAILI, LI HUAZHAO, LIU YONGXIN, MA YUBIN, LI ZHENJIANG
Year of Publication 13.02.2013
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Year of Publication 13.02.2013
Patent
Control system of mixed oil-gas burner
LAI JIANBO, WEI HONGJUAN, CHEN GUANGMING, XIE QINYUAN, XU CHUN, ZENG XIANYING, MA YUBIN
Year of Publication 02.06.2010
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Year of Publication 02.06.2010
Patent
An anchor return locker device for coal mine re-exploration laneway
ZHANG BAISHENG, LIAN JIANJUN, LI BAOXING, CUI SHUJIANG, YANG JINSONG, WANG FAHUI, TIAN LONG, MA YUBIN
Year of Publication 20.02.2008
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Year of Publication 20.02.2008
Patent