Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12281466 | Indoor grey water purification and reuse device, system and method for public buildings | Li Zhao, Xingchao Lu, Wenchao Yin, Xin Zhao, Jianye Li +1 more | 2025-04-22 |
| 11976554 | Bottom-hole impact-rotation stepping combined unloading rock-breaking efficient drilling system and method thereof | Sen-Jung Wei, Zhichuan Guan, Deyong Zou | 2024-05-07 |
| 11750198 | RC oscillator | Yanqin Chen, Chunbiao Wu, Bingzhao Zhang | 2023-09-05 |
| 11591896 | Efficient and intelligent steering drilling system and drilling method | — | 2023-02-28 |
| 11255127 | Drill bit with joint function of induced unloading and abrasive jet and drilling method thereof | Zhichuan Guan | 2022-02-22 |
| 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 | Zhichuan Guan, Yucai Shi, Hualin Liao, Ben Guan | 2020-10-27 |
| 10801282 | Screw drill bypass valve with large displacement diversion function | Yucai Shi, Zhibin Fan, Zhichuan Guan, 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, Yucai Shi +1 more | 2020-07-21 |
| 10496591 | Converting a mode controlling differential signal in a drive circuit and a driving method | Junming Han, Bingzhao Zhang, Jie Peng | 2019-12-03 |
| 10233695 | Weight-on-bit self-adjusting drill bit | Zhichuan Guan, Huaigang Hu, Ben Guan, Yucai Shi, Hualin Liao | 2019-03-19 |
| 9654115 | Phase-locked loop circuit, data recovery circuit, and control method for phase-locked loop circuit | Bingzhao Zhang | 2017-05-16 |
| 9540881 | Method and system for improving drilling speed by using drill speed vibration | Zhichuan Guan, Wenzhong Wei, Ben Guan, Yucai Shi, Hongning Zhang | 2017-01-10 |