Controllable lifting and releasing fishing spear
WANG FENKANG, ZHANG ZHENSHAN, LI ZENGWEI, XIA LIGUO, LI NA, BI XINZHONG, ZHANG GUANGHUI, LI HUABIN
Year of Publication 07.05.2014
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Year of Publication 07.05.2014
Patent
Operating platform for minor-repairing of well mouth
WANG FENKANG, ZHANG ZHENSHAN, LI ZENGWEI, XIA LIGUO, LI NA, LIU GUANGYOU, ZHANG GUANGHUI, LI HUABIN
Year of Publication 26.03.2014
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Year of Publication 26.03.2014
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Pressure testing device of oil-water well operation well head and blowout preventer
WANG FENKANG, CHANG FANGRUI, ZHANG ZHENSHAN, CUI QIANG, LI ZENGWEI, LI ZUORONG, MA CHANGJIN, LIU TAO
Year of Publication 13.03.2013
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Year of Publication 13.03.2013
Patent