Inventor
FENGZHONG QI
Inventor
CN
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C04Bprimary
C04BLime, magnesia33%
C09KMaterials for miscellaneous applications, not provided for elsewhere33%
Y02WClimate change mitigation technologies related to wastewater treatment or waste management20%
E21BEarth or rock drilling13%
PatentTitleYear
12,497,331High-strength Portland cement slurry for ultra-high temperature cementing, preparation method therefor and application thereof202512,391,861Cement slurry system, preparation method therefor and use thereof202512,305,116Ultra-high temperature resistant cement slurry system for cementing and preparation method and use thereof202511,926,787Well cementing method for improving well cementing quality by controlling hydration heat of cement slurry202411,618,844High temperature resistant Portland cement slurry and production method thereof2023Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2023–2025Patents assigned to CNPC ENG TECH RES & DEV CO LTD (5)· patent assignee history
2023–2025Patents assigned to CHINA NAT PETROLEUM CORP (4)· patent assignee history
2023–2025Based in CN· patent location history
2024Patents assigned to PETROCHINA CO LTD (1)· patent assignee history
2025Patents assigned to BEIJING HUAMEI INC CNPC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CNPC ENG TECH RES & DEV CO LTD | 5 | 2023–2025 |
| CHINA NAT PETROLEUM CORP | 4 | 2023–2025 |
| BEIJING HUAMEI INC CNPC | 1 | 2025 |
| PETROCHINA CO LTD | 1 | 2024 |
Locations
| Location | Patents | Span |
|---|---|---|
| CN | 5 | 2023–2025 |