Issued Patents 2019
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10392872 | Pressure control device for use with a subterranean well | James W. Chambers | 2019-08-27 |
| 10267117 | Radial seal pressure reduction using internal pump | Thomas F. Bailey, James W. Chambers, Don M. Hannegan | 2019-04-23 |
| 10227838 | Drilling system and method having flow measurement choke | Walter S. Dillard | 2019-03-12 |
| 10190378 | Drilling head with non-rotating annular seal assembly | Vahidin Alajbegovic | 2019-01-29 |