Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11060009 | Filtrate reducer for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection, drilling fluid, and uses thereof | Yuping Yang, Jingping Liu, Ying Wang, Long Li, Yan Zhang +3 more | 2021-07-13 |
| 11027405 | Power tool | Shisong Zhang, Xiaoli Pang, Hongfeng Zhong, Yu Wu, Weifeng Li +7 more | 2021-06-08 |
| 11028651 | Drilling rig | Rui LUO, Ting Zhang, Xiaowu OU, Qionghua Yang, Yuegang Xu +2 more | 2021-06-08 |