Issued Patents 2019
Showing 1–1 of 1 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 |