Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10774257 | Random copolymer and preparation method thereof, and drilling fluid | Xiaohua Yang, Lin Wang, Jian He, Junbin JIN, Fan Yang +1 more | 2020-09-15 |
| 10538484 | Maleamic acid monomer and preparation method and use thereof | Xiaohua Yang, Jian He, Lin Wang, Haibo Wang, Fan Yang +2 more | 2020-01-21 |
| 10150903 | Composition and use therof, oil-based drilling fluid and a method for raising shearing force of oil-based drilling fluid | Xianguang Wang, Zhoujun LI, Xiuzhen Han, Sheng Li, Xiaohua Yang +3 more | 2018-12-11 |
| 9243180 | Filtration control agent and a drilling fluid containing the same | Xiaohua Yang, Lin Wang, Sheng Li, Long Chai, Xiaoqiang Dong | 2016-01-26 |