Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11946327 | Automatic rheological parameter measuring system and use method for flowing drilling fluid with high temperature and high-pressure | Feifei Zhang, Tao Peng, Yidi Wang, He Liu, Zhong Cheng +2 more | 2024-04-02 |
| 11021919 | Mud circulation system for reducing the swab pressure while tripping out | Feifei Zhang, Yidi Wang, Xi Wang, Siyang Li | 2021-06-01 |