Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12398624 | Self-energizing seal for expandable liner hanger | Xiaoguang Allan Zhong, Yian Zhao, Chee Sing Kelvin Loh | 2025-08-26 |
| 12215562 | Seal element with profiled surface for a downhole tool in a wellbore | Xiaoguang Allan Zhong, Michael Linley Fripp | 2025-02-04 |
| 11732545 | Radially expandable anti-extrusion backup ring | Xiaoguang Allan Zhong | 2023-08-22 |
| 11391120 | Robustness of flapper valve open/close | Xiaoguang Allan Zhong, David Allen Dockweiler | 2022-07-19 |
| 11377934 | Downhole tool with compliant metal-to-metal seal | Xiaoguang Allan Zhong | 2022-07-05 |