Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11441062 | Modified polyvinyl acetate and preparation method and use thereof and oil-based drilling fluid | Yang Bai, Pingya Luo, Gang Xie, Danchao Huang, Dezhi Liu +3 more | 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, Cheng Li, Yan Cheng +2 more | 2022-01-18 |