Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11686173 | Rotary control device with self-contained hydraulic reservoir | Douglas Jahnke | 2023-06-27 |
| 11225847 | Universal riser joint for managed pressure drilling and subsea mudlift drilling | Bastiaan Liezenberg, Harold Tenorio, Jeffrey Ham | 2022-01-18 |
| 11149507 | Rotating control device | — | 2021-10-19 |
| 10669778 | Pressure system for bearing assembly and method of use | Michael Sawyer | 2020-06-02 |
| 10648262 | Running tool for use with bearing assembly | — | 2020-05-12 |
| 8047280 | Drillable bridge plug | William M. Roberts, Piro Shkurti, George J. Melenyzer | 2011-11-01 |
| 7810558 | Drillable bridge plug | Piro Shkurti, William M. Roberts, George J. Melenyzer | 2010-10-12 |
| 7665516 | Permanent anchoring device | William M. Roberts | 2010-02-23 |