Issued Patents 2020
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10641067 | Mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology | Binggui Xu, Hongwei Yin, Huijuan Guo, Zhitong Liu, Mingjie Lv +6 more | 2020-05-05 |