Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11639461 | Reversible oil-based mud | Hui Zhang, Changping Sui, Paulo Pauferro, Jr. | 2023-05-02 |
| 10537829 | Emulsion preventer for completion brines | Changping Sui, Hui Zhang, Steven Young | 2020-01-21 |
| 10214435 | Non-emulsifier for completion brines to prevent emulsion from forming | Changping Sui, Hui Zhang, Steven Young | 2019-02-26 |