Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11085245 | Multi-path combined high-low voltage plasma rock-breaking drill bit, drill bit apparatus and drilling method | Yonghong Liu, Qiang Sun, Qingyun Li, Baoping Cai, Xiaopeng Li +5 more | 2021-08-10 |
| 10989019 | Fully-electrically driven downhole safety valve | Baoping Cai, Yonghong Liu, Chuntan Gao, Chaoyang Sheng, Peng Liu +9 more | 2021-04-27 |