Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11578251 | Amphiphilic block polymer ultralow-permeability agent and intelligent temporary plugging type water-based drilling fluid | Yinbo He, Guancheng Jiang, Lili Yang, Tengfei Dong, Bin Tan +9 more | 2023-02-14 |
| 11034876 | Calcium-resistant zwitterionic polymer, preparation method and application thereof, and water-based drilling fluid containing polymer as dispersant | Yinbo He, Guancheng Jiang, Tengfei Dong, Lili Yang, Haiyang Liu +6 more | 2021-06-15 |