Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10337289 | High temperature viscosifier for insulating packer fluids | Balakrishnan Panamarathupalayam, Changping Sui, Hui Zhang | 2019-07-02 |
| 10273400 | Colloidal silica and polymer system for insulating packer fluids | Changping Sui, Balakrishnan Panamarathupalayam, Hui Zhang | 2019-04-30 |