Inventor
Yongren Feng
Inventor
Beijing, CN
Overview
Patents· 7 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling46%
F16HGearing15%
F04BPositive-displacement machines for liquids8%
F16LPipes8%
G01DMeasuring not specially adapted for a specific variable8%
H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines8%
H02KDynamo-electric machines8%
PatentTitleYear
10,381,899Sidewall coring structure directly driven by an electric motor201910,236,667Wire follow-up protection structure of electric reducer201910,208,736High-pressure fluid mixing pump control system and fluid suction control method201910,180,064System for sampling from formation while drilling201910,018,038Drilling type sidewall coring apparatus20189,988,899Rock formation testing method and formation testing instrument20189,982,816Pup joint for releasing sidewall contact of stratigraphic test device and apparatus2018Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2018–2019Patents assigned to CHINA NAT OFFSHORE OIL CORP (7)· patent assignee history
2018–2019Patents assigned to CHINA OILFIELD SERVICES LTD (7)· patent assignee history
2018–2019Based in Beijing, CN· patent location history
2018–2019Based in Langfang, CN· patent location history
2018Based in Sanhe, CN· patent location history
2019Based in Hebei, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CHINA NAT OFFSHORE OIL CORP | 7 | 2018–2019 |
| CHINA OILFIELD SERVICES LTD | 7 | 2018–2019 |
Locations
| Location | Patents | Span |
|---|---|---|
| Beijing, CN | 3 | 2018–2019 |
| Langfang, CN | 2 | 2018–2019 |
| Hebei, CN | 1 | 2019 |
| Sanhe, CN | 1 | 2018 |