Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10487255 | Expandable plugging agent and preparation method thereof, micro-capsule plugging agent, water-based drilling fluid, and use thereof | Yang Bai, Pingya Luo, Jinsheng Sun, Guancheng Jiang, Jiading Deng +1 more | 2019-11-26 |
| 10336932 | Micro-nano composite plugging agent for drilling fluid and preparation method thereof, and drilling fluid and use thereof | Yang Bai, Pingya Luo, Jinsheng Sun, Guancheng Jiang, Jiading Deng +1 more | 2019-07-02 |
| 10265746 | Rotary extrusion producing method for producing inner ring rib with large aspect ratio formed of hollow billet | Zhimin Zhang, Jianmin Yu, Qiang Wang, Mei Cheng | 2019-04-23 |