Method for lowering oil pipe in gas well without well-killing, soluble bridge plug and material preparation method thereof
US-11313192-B2 · Apr 26, 2022 · US
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He Mingfang patents
He Mingfang is listed as an inventor on 2 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | He Mingfang |
| Total patents | 2 |
| First publication | Feb 6, 2020 |
| Latest publication | Apr 26, 2022 |
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Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Petrochina Co Ltd | 2 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| C22C1/03 | 2 |
| E21B33/1293 | 2 |
| C22C1/026 | 2 |
| C22C21/06 | 2 |
| E21B33/134 | 2 |