Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12276191 | Electromagnetic reversal downhole pressure intensifier | Yuhang He, Wenlong Niu, Jilei NIU, Huajian Wang, Yuntao Liao +2 more | 2025-04-15 |
| 10927607 | Drilling speed increasing device driven by downhole motor for generating shock vibration | Can Yi, Jilei NIU, Zhichuan Guan, Zhonghai Zhou, Yucai Shi +1 more | 2021-02-23 |
| 10815743 | Depressuriz od for downhole annulus drilling fluid | Yongwang Liu, Zhichuan Guan, Yucai Shi, Ben Guan | 2020-10-27 |
| 10718176 | Drilling speed improvement device capable of producing both hydraulic pulse and impact vibration | Jilei NIU, Zhichuan Guan, Yandong Yang, Yucai Shi, Yongwang Liu +1 more | 2020-07-21 |
| 10697277 | Simulation device and method for integrated evaluation experiment for sand control wellbore plugging and plugging removal | Lin Dong, Jilei NIU, Changyin Dong, Wenhao Ma, Shuai Yang +3 more | 2020-06-30 |
| 10233695 | Weight-on-bit self-adjusting drill bit | Zhichuan Guan, Yongwang Liu, Huaigang Hu, Ben Guan, Yucai Shi | 2019-03-19 |