Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9828829 | Intermediate completion assembly for isolating lower completion | Raymond A. Frisby, Jeffrey S. Phillips, Donald P. Lauderdale | 2017-11-28 |
| 9027651 | Barrier valve system and method of closing same by withdrawing upper completion | Raymond A. Frisby, Jeffrey S. Phillips, Donald P. Lauderdale | 2015-05-12 |
| 9016372 | Method for single trip fluid isolation | Raymond A. Frisby, Jeffrey S. Phillips, Donald P. Lauderdale | 2015-04-28 |
| 9016389 | Retrofit barrier valve system | Raymond A. Frisby, Jeffrey S. Phillips, Donald P. Lauderdale | 2015-04-28 |