Issued Patents 2020
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10648286 | Methods for cementing a well using a switchable crossover device | Bo Gao, Lonnie Carl Helms, Yuzhu Hu, Gary Joe Makowiecki | 2020-05-12 |
| 10557329 | Systems and methods for controlling fluid flow in a wellbore using a switchable downhole crossover tool with rotatable sleeve | Bo Gao, Lonnie Carl Helms, Yuzhu Hu, Gary Joe Makowiecki | 2020-02-11 |