Issued Patents 2021
Showing 1–4 of 4 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 | Xianbin Huang, Jinsheng Sun, Kaihe Lv, Yingrui Bai, Jintang Wang +1 more | 2021-07-27 |
| 11060009 | Filtrate reducer for temperature-resistant calcium-resistant water-based drilling fluid used in oil and gas reservoir protection, drilling fluid, and uses thereof | Yuping Yang, Ying Wang, Long Li, Yan Zhang, Yushuang Liu +3 more | 2021-07-13 |
| 11053424 | Temperature-resistant calcium-resistant water-based drilling fluid for oil and gas reservoir protection and use thereof | Yuping Yang, Min Chang, Long Li, Jinhong Wang, Yan Zhang +1 more | 2021-07-06 |
| 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 |