Search Results - "NIU GUIFENG" :: K.UTB vyhledávací portál | TBU Library Retrieval Portal

Wear-resistant fluorine-lined wafer butterfly valve

Wear-resistant fluorine-lined wafer butterfly valve

by NIU GUIFENG
Year of Publication 27.06.2023

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Patent

Flange gate valve

Flange gate valve

by NIU GUIFENG
Year of Publication 12.05.2023

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Patent

Center line-type butterfly valve capable of adjusting water flow

Center line-type butterfly valve capable of adjusting water flow

by NIU GUIFENG
Year of Publication 24.03.2023

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Patent

Leak-proof fluorine-lined wafer butterfly valve

Leak-proof fluorine-lined wafer butterfly valve

by NIU GUIFENG
Year of Publication 17.01.2023

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Patent

Butterfly valve with middle line lined with rubber

Butterfly valve with middle line lined with rubber

by NIU GUIFENG
Year of Publication 23.12.2022

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Patent

Pneumatic center line-type butterfly valve with lower limiting device

Pneumatic center line-type butterfly valve with lower limiting device

by NIU GUIFENG
Year of Publication 23.12.2022

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Patent

Fluorine-lined wafer butterfly valve with long service life

Fluorine-lined wafer butterfly valve with long service life

by NIU GUIFENG
Year of Publication 09.12.2022

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Patent

Heat preservation rock wool board processing technology

Heat preservation rock wool board processing technology

by NIU GUIFENG
Year of Publication 08.11.2022

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Patent

Latent pump flow string of two electricity of canning in pit

Latent pump flow string of two electricity of canning in pit

by NIU GUIFENG, CHENG XINPING
Year of Publication 23.09.2015

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Patent

Fixed string coiled tubing dragging jet pump gas lift process string and operation method thereof

Fixed string coiled tubing dragging jet pump gas lift process string and operation method thereof

by HUANG YUXUAN, LI MENGCHAO, NIU GUIFENG, CHENG XINPING
Year of Publication 29.03.2022

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Patent

Intelligent layered injection allocation tubular column for water-polymer separation injection well and operation method of intelligent layered injection allocation tubular column

Intelligent layered injection allocation tubular column for water-polymer separation injection well and operation method of intelligent layered injection allocation tubular column

by LIU MIN, HUANG YUXUAN, WEI LAI, NIU GUIFENG, LI YUNFENG, CHENG XINPING
Year of Publication 03.02.2023

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Patent

Double-medium layered injection flow control device and control method thereof

Double-medium layered injection flow control device and control method thereof

by LIU MIN, MAO QINGKAI, ZHANG LEI, NIU GUIFENG, HUANG ZECHAO, YANG WANYOU, WANG LIANGJIE, CHENG XINPING
Year of Publication 10.05.2022

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Patent

Layered polymer injection cylinder with intelligent testing and adjusting function

Layered polymer injection cylinder with intelligent testing and adjusting function

by LIU MIN, ZHAO PENG, HUANG YUXUAN, WEI LAI, JANG JI-WOONG, NIU GUIFENG, CHENG XINPING
Year of Publication 03.02.2023

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Patent

Leakage-proof and moisture-proof sealing structure of electric control water injection working barrel and using method of leakage-proof and moisture-proof sealing structure

Leakage-proof and moisture-proof sealing structure of electric control water injection working barrel and using method of leakage-proof and moisture-proof sealing structure

by WEI LAI, HUANG YUXUAN, WANG DONG, WANG HONG, WANG JILIANG, NIU GUIFENG, WANG LIANGJIE, JIANG CHANG, XING HONGXIAN, YAN SHEN
Year of Publication 12.07.2022

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Patent

Large-discharge-capacity oil-water separation automatically flowing water injection system

Large-discharge-capacity oil-water separation automatically flowing water injection system

by LIU MIN, LUO CHANGHUA, WANG YAO, MENG WEIBIN, ZHANG CHENGFU, WANG SHENG, NIU GUIFENG
Year of Publication 25.03.2015

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Patent

High-flow-rate underground oil-water separation and annular space testing and regulating system

High-flow-rate underground oil-water separation and annular space testing and regulating system

by WANG YAO, LUO CHANGHUA, MAO QINGKAI, MA XICHAO, ZHANG CHENGFU, WANG SHENG, NIU GUIFENG, YANG WANYOU
Year of Publication 21.10.2015

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Patent

Underground rod pipe safety valve

Underground rod pipe safety valve

by AI ZHIJIU, YE ZHEWEI, HU KUN, MA HAIFENG, NIU GUIFENG
Year of Publication 19.08.2015

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Patent

Water and polymer layered injection device suitable for offshore oil fields

Water and polymer layered injection device suitable for offshore oil fields

by LIU MIN, ZHANG FENGHUI, CHAO SHENGQI, NIU GUIFENG, HUANG ZECHAO, YANG WANYOU
Year of Publication 15.02.2019

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Patent

Downhole injection device being able to change polymer viscosity

Downhole injection device being able to change polymer viscosity

by LIU MIN, MAO QINGKAI, NIU GUIFENG, HUANG ZECHAO, YANG WANYOU, WANG LIANGJIE
Year of Publication 18.12.2018

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Patent

A one-pass pipe string layered water injection sand control backwashing device and a method

A one-pass pipe string layered water injection sand control backwashing device and a method

by LUO CHANGHUA, LIU YIGANG, ZOU JIAN, MENG XIANGHAI, NIU GUIFENG, ZHANG ZHIXIONG, YANG WANYOU
Year of Publication 27.11.2018

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Patent