Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11002126 | Active control method and control device for wellbore pressure in the open-cycle drilling of marine natural gas hydrates | Zhiyuan Wang, Jianbo Zhang, Baojiang Sun, Xiaohui Sun, Zheng Liu +1 more | 2021-05-11 |