Safety switch of valve
JIE ZHANG, KUICHENG GAO, HONGHAO HU, HAIBIN WANG, CHENGSHAN ZHENG, YUNTAO YANG
Year of Publication 19.04.2006
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Year of Publication 19.04.2006
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Multifunction polish rod secondary packing box
HONGQUAN ZHANG, KUICHENG GAO, HONGHAO HU, BO LIU, CHENGSHAN ZHENG, SIYOU SHANG
Year of Publication 02.11.2005
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Year of Publication 02.11.2005
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Blocking-resisting device for oil reservoir
ZIJIANG GUO, MINGCAI MIAO, KUICHENG GAO, HONGHAO HU, MINGYU CHONG, XIAODONG ZHAO
Year of Publication 05.10.2005
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Year of Publication 05.10.2005
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Oil nozzle type single flow valve
HONGQUAN ZHANG, FENG LIU, KUICHENG GAO, GUANZHONG LU, HONGHAO HU, HONGWEI ZHAO, BAODING ZHANG, SIYOU SHANG
Year of Publication 27.09.2006
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Year of Publication 27.09.2006
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Composite anti-pump retaining pipe for deep well pump
ZIJIANG GUO, HONGCHEN CUI, KUICHENG GAO, HONGHAO HU, GUICHENG GAO, BO LIU, HONGBING XU
Year of Publication 27.09.2006
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Year of Publication 27.09.2006
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Theft-proof cutting off sampler for oil well
ZIJIANG GUO, YUBIN LI, KUICHENG GAO, YONGDA MA, HONGHAO HU, SIYOU SHANG
Year of Publication 05.10.2005
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Year of Publication 05.10.2005
Patent
Spacer type single flow valve
ZIJIANG GUO, KUICHENG GAO, HONGHAO HU, XIANGYANG GE, BO LIU, BAODING ZHANG, ZHANLIANG CHU, XIAOMING SHAN
Year of Publication 27.09.2006
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Year of Publication 27.09.2006
Patent
Pipeline pickling device of water injection well
ZHAO HUI, XU FENGHE, GAO KUICHENG, GUO XINFENG, ZHAO GANG, PANG MINGYU, HU HONGHAO, YI SHANLI
Year of Publication 03.12.2008
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Year of Publication 03.12.2008
Patent