Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11440982 | Ester polymer, preparation method therefor and use thereof | Songbai Tian, Xiaowei Wang, Qundan Zhang, Hu Li, Xinyu Zhu | 2022-09-13 |
| 11225594 | Drilling fluid for enhancing stratum pressure bearing capacity and preparation method and method of using thereof | Yang Bai, Pingya Luo, Hao Zhang, Yan Cheng, Guojun Li +2 more | 2022-01-18 |