Inventor
Zhichuan Guan
Inventor
Qingdao, CN
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling83%
G06FElectric digital data processing17%
PatentTitleYear
10,815,743Depressuriz od for downhole annulus drilling fluid202010,801,282Screw drill bypass valve with large displacement diversion function202010,718,176Drilling speed improvement device capable of producing both hydraulic pulse and impact vibration202010,233,695Weight-on-bit self-adjusting drill bit20199,540,881'Method and system for improving drilling speed by using drill speed vibration'2017Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2017–2020Patents assigned to UNIV CHINA PETROLEUM EAST CHINA (5)· patent assignee history
2017Patents assigned to GUAN BEN (1)· patent assignee history
2017Patents assigned to GUAN ZHICHUAN (1)· patent assignee history
2017Patents assigned to LIU YONGWANG (1)· patent assignee history
2017Patents assigned to SHI YUCAI (1)· patent assignee history
2017–2020Based in Qingdao, CN· patent location history
2020Based in Shandong, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| UNIV CHINA PETROLEUM EAST CHINA | 5 | 2017–2020 |
| GUAN BEN | 1 | 2017 |
| GUAN ZHICHUANself | 1 | 2017 |
| LIU YONGWANG | 1 | 2017 |
| SHI YUCAI | 1 | 2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Qingdao, CN | 4 | 2017–2020 |
| Shandong, CN | 1 | 2020 |