Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10329860 | Managed pressure drilling system having well control mode | Michael Brian Grayson | 2019-06-25 |
| 9951600 | Managed pressure cementing | Don M. Hannegan, Cesar Pena, David Pavel, Michael Brian Grayson, Todd Douglas Cooper +2 more | 2018-04-24 |
| 9249646 | Managed pressure cementing | Don M. Hannegan, Cesar Pena, David Pavel, Michael Brian Grayson, Todd Douglas Cooper +2 more | 2016-02-02 |