Issued Patents 2023
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11834387 | Quaternary ammonium salt and preparation method and use thereof as inhibitor, and water-based drilling fluid and use thereof | Fuchang You, Kai JIAO, Shusheng Zhou | 2023-12-05 |
| 11787893 | Polyaspartic acid derivative and preparation method and use thereof as lubricant, and water-based drilling fluid and use thereof | Fuchang You, Kai JIAO, Shusheng Zhou | 2023-10-17 |
| 11674887 | Apparatus and method for testing dynamic sealability of fluid in the downhole minor leaks | Lin Xu, Xiaohe Huang, Yue Huang, Yingying Guo, Huanzhi Feng +3 more | 2023-06-13 |