Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9951600 | Managed pressure cementing | Don M. Hannegan, Cesar Pena, David Pavel, Michael Brian Grayson, Said Boutalbi +2 more | 2018-04-24 |
| 9249646 | Managed pressure cementing | Don M. Hannegan, Cesar Pena, David Pavel, Michael Brian Grayson, Said Boutalbi +2 more | 2016-02-02 |