Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11236562 | Safety drilling system and method for preventing collapse of water-sensitive formation in upper part of high-pressure saltwater layer | Qian Li, Xiaolin Zhang, Hu Yin, Wenfeng Yin | 2022-02-01 |