Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11072738 | Environment-friendly high-temperature resistant water-based drilling fluid plugging anti-sloughing agent, preparation method thereof and the water-based drilling fluid | Jinsheng Sun, Kaihe Lv, Jingping Liu, Yingrui Bai, Jintang Wang +1 more | 2021-07-27 |
| 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, Wuquan Li +6 more | 2021-06-15 |