Patents/Inventors

Jifang Wan

JingzhouCN4 patents

5 Patents

US126128562026
Lost Circulation Detection Device
CNPC Engineering Technology R&D Company Limited
0 cites
US122589492025
Two-stroke Pumping Method and Oil Production Device
Yangtze University
0 cites
US118519522023
Downhole Displacement Impact Method and Impact Drilling Tool
Yangtze University
0 cites
USD09884682023
Watering Can
0 cites
USD09803862023
Watering Can
0 cites