Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10989036 | Drilling casing and method of performing fast drilling and completion of large-borehole multilateral well | Chuanliang Yan, Xu Ren, Yuanfang Cheng, Wanqing Tian, Yang Li +2 more | 2021-04-27 |
| 10954758 | Device and working method for drilling hydrate micro-borehole and performing fast completion | Chuanliang Yan, Xiaorong Li, Xu Ren, Yuanfang Cheng, Zhongying Han +3 more | 2021-03-23 |