Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12196725 | Evaluation apparatus for seal integrity of wellbores in full life cycle and evaluation methods thereof | Duo Hou, Zhi Zhang, Zhongling Xiao, Huabo Yang, Jian Ren | 2025-01-14 |
| 11828733 | Device for testing strength and sealing performance of cement sheath after perforation and using method thereof | Duo Hou, Zhongling Xiao, Zhi Zhang, Jian Dong Ding, Jiawei Wang | 2023-11-28 |
| 9850716 | Remote-controlled adjustable-speed screw drill for gas-drive hydraulic-motive during gas drilling | Tiejun Lin, Ying Zhang, Zhanghua Lian, Qiang Zhang, Yong He +2 more | 2017-12-26 |