Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8437995 | Drill bit and design method for optimizing distribution of individual cutter forces, torque, work, or power | Oliver Matthews, Shilin Chen | 2013-05-07 |
| 7740079 | Fracturing plug convertible to a bridge plug | Jesse Cale Porter | 2010-06-22 |
| 7191852 | Energy accelerator | — | 2007-03-20 |
| 5238075 | Drill bit with improved cutter sizing pattern | Carl W. Keith | 1993-08-24 |
| 5099929 | Unbalanced PDC drill bit with right hand walk tendencies, and method of drilling right hand bore holes | Carl W. Keith, William W. King | 1992-03-31 |