Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11506041 | Drilling-slitting-sealing-fracturing device and method for a deep low-permeability gassy coal seam | Gang Wang, Zhiyuan Liu, Weimin Cheng, Xiangjie Qin, Jiuyuan Fan +5 more | 2022-11-22 |
| 11396810 | Full-length screen pipe hole protection device and method with pressurized hole packing in soft coal seam | Kai Dong, Weimin Cheng, Jingna Xie, Gang Wang, Yixin Liu +1 more | 2022-07-26 |
| 10253629 | Test apparatus and a test method for the wetted perimeter of coal seam water injection | Weimin Cheng, Zhen Liu, Gang Wang, Gang Zhou, Lianjun CHEN +4 more | 2019-04-09 |