Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10337289 | High temperature viscosifier for insulating packer fluids | Balakrishnan Panamarathupalayam, Changping Sui, William E. Foxenberg | 2019-07-02 |
| 10273400 | Colloidal silica and polymer system for insulating packer fluids | Changping Sui, Balakrishnan Panamarathupalayam, William E. Foxenberg | 2019-04-30 |
| 10214435 | Non-emulsifier for completion brines to prevent emulsion from forming | Changping Sui, Pawilai Chinwangso, Steven Young | 2019-02-26 |