Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9902890 | Drilling fluid additive composition suitable for coal-bed gas wells, and water-based drilling fluid and use thereof | Guancheng Jiang, Yinbo He, Chong Liu, Lili Yang, Yong Wang +7 more | 2018-02-27 |
| 9890318 | Drilling fluid additive composition and water-based drilling fluid suitable for high-pressure plugging | Guancheng Jiang, Chong Liu, Yinbo He, Lili Yang, Yong Wang +10 more | 2018-02-13 |