Inventor
Haiquan TANG
Inventor
CN
Overview
Patents· 1 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling100%
PatentTitleYear
12,252,986Steerable drilling device2025Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2025Patents assigned to CHINA PETROLEUM & CHEM CORP (1)· patent assignee history
2025Patents assigned to GEOSTEERING & LOGGING RES INSTITUTE SINOPEC MATRIX CORPORATION (1)· patent assignee history
2025Patents assigned to SINOPEC MATRIX CORP (1)· patent assignee history
2025Patents assigned to SINOPEC PETROLEUM ENGINEERING TECH SERVICE CO LTD (1)· patent assignee history
2025Patents assigned to SINOPEC SHENGLI PETROLEUM ENG CO LTD (1)· patent assignee history
2025Based in CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CHINA PETROLEUM & CHEM CORP | 1 | 2025 |
| GEOSTEERING & LOGGING RES INSTITUTE SINOPEC MATRIX CORPORATION | 1 | 2025 |
| SINOPEC MATRIX CORP | 1 | 2025 |
| SINOPEC PETROLEUM ENGINEERING TECH SERVICE CO LTD | 1 | 2025 |
| SINOPEC SHENGLI PETROLEUM ENG CO LTD | 1 | 2025 |
Locations
| Location | Patents | Span |
|---|---|---|
| CN | 1 | 2025 |