Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9790415 | Modified silicon dioxide nano-particles and preparation method thereof, and drilling fluid suitable for shale gas wells | Guancheng Jiang, Yinbo He, Qingying Ge, Lili Yang, Fan Liu +7 more | 2017-10-17 |
| 9745501 | Additive composition suitable for viscosity reduction of oil-based drilling fluid, oil-based drilling fluid and use thereof | Guancheng Jiang, Shuanglei Peng, Yinbo He, Zhengqiang Deng, Lili Yang +8 more | 2017-08-29 |