Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10927607 | Drilling speed increasing device driven by downhole motor for generating shock vibration | Hualin Liao, Jilei NIU, Zhichuan Guan, Zhonghai Zhou, Yucai Shi +1 more | 2021-02-23 |