Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12276191 | Electromagnetic reversal downhole pressure intensifier | Hualin Liao, Yuhang He, Wenlong Niu, Jilei NIU, Huajian Wang +2 more | 2025-04-15 |
| 10927607 | Drilling speed increasing device driven by downhole motor for generating shock vibration | Hualin Liao, Can Yi, Jilei NIU, Zhichuan Guan, Zhonghai Zhou +1 more | 2021-02-23 |
| 10815743 | Depressuriz od for downhole annulus drilling fluid | Yongwang Liu, Zhichuan Guan, Hualin Liao, Ben Guan | 2020-10-27 |
| 10801282 | Screw drill bypass valve with large displacement diversion function | Zhibin Fan, Zhichuan Guan, Yongwang Liu, Weixing YANG, Zhixiang Teng +2 more | 2020-10-13 |
| 10718176 | Drilling speed improvement device capable of producing both hydraulic pulse and impact vibration | Hualin Liao, Jilei NIU, Zhichuan Guan, Yandong Yang, Yongwang Liu +1 more | 2020-07-21 |
| 10233695 | Weight-on-bit self-adjusting drill bit | Zhichuan Guan, Yongwang Liu, Huaigang Hu, Ben Guan, Hualin Liao | 2019-03-19 |
| 9540881 | Method and system for improving drilling speed by using drill speed vibration | Zhichuan Guan, Yongwang Liu, Wenzhong Wei, Ben Guan, Hongning Zhang | 2017-01-10 |