Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9605499 | Subsea wellhead pressure indicating and automatic adjusting device for deep-water dual-gradient drilling | Baojiang Sun, Zhiyuan Wang, Ning Wang, Xuerui Wang, Guomin Yan +1 more | 2017-03-28 |