Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10408014 | Well killing method and device for a fractured formation without safety pressure window by five-step bullheading | Baojiang Sun, Xueqing Teng, Yaoming Zhang, Zhiyuan Wang, Hongtao Liu +1 more | 2019-09-10 |
| 10337267 | Control method and control device for drilling operations | Zhiyuan Wang, Shaowei Pan, Baojiang Sun, Jing Yu | 2019-07-02 |