Issued Patents All Time
Showing 26–50 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6241036 | Reinforced abrasive-impregnated cutting elements, drill bits including same | Lorenzo G. Lovato | 2001-06-05 |
| 6206117 | Drilling structure with non-axial gage | James A. Norris | 2001-03-27 |
| 6202770 | Superabrasive cutting element with enhanced durability and increased wear life and apparatus so equipped | Stephen R. Jurewicz, Kenneth M. Jensen | 2001-03-20 |
| 6123160 | Drill bit with gage definition region | — | 2000-09-26 |
| 6098731 | Drill bit compact with boron or beryllium for fracture resistance | Jacob Chow, Ralph M. Horton, Redd H. Smith | 2000-08-08 |
| 6082223 | Predominantly diamond cutting structures for earth boring | — | 2000-07-04 |
| 6021859 | Stress related placement of engineered superabrasive cutting elements on rotary drag bits | Evan C. Turner | 2000-02-08 |
| 6006846 | Cutting element, drill bit, system and method for drilling soft plastic formations | Craig H. Cooley | 1999-12-28 |
| 6000483 | Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped | Stephen R. Jurewicz, Kenneth M. Jensen | 1999-12-14 |
| 5950747 | Stress related placement on engineered superabrasive cutting elements on rotary drag bits | Evan C. Turner | 1999-09-14 |
| 5947214 | BIT torque limiting device | — | 1999-09-07 |
| 5924501 | Predominantly diamond cutting structures for earth boring | — | 1999-07-20 |
| 5906245 | Mechanically locked drill bit components | Paul E. Pastusek | 1999-05-25 |
| 5878634 | Earth boring drill bit with shell supporting an external drilling surface | — | 1999-03-09 |
| 5820985 | PDC cutters with improved toughness | Jacob Chow, Ralph M. Horton, Redd H. Smith | 1998-10-13 |
| 5787022 | Stress related placement of engineered superabrasive cutting elements on rotary drag bits | Evan C. Turner | 1998-07-28 |
| 5740873 | Rotary bit with gageless waist | — | 1998-04-21 |
| 5706906 | Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped | Stephen R. Jurewicz, Kenneth M. Jensen | 1998-01-13 |
| 5678645 | Mechanically locked cutters and nozzles | Paul E. Pastusek | 1997-10-21 |
| 5671816 | Swivel/tilting bit crown for earth-boring drills | — | 1997-09-30 |
| 5666864 | Earth boring drill bit with shell supporting an external drilling surface | — | 1997-09-16 |
| 5651420 | Drilling apparatus with dynamic cuttings removal and cleaning | Craig H. Cooley | 1997-07-29 |
| 5605198 | Stress related placement of engineered superabrasive cutting elements on rotary drag bits | Evan C. Turner | 1997-02-25 |
| 5595254 | Tilting bit crown for earth-boring drills | — | 1997-01-21 |
| 5590729 | Superhard cutting structures for earth boring with enhanced stiffness and heat transfer capabilities | Craig H. Cooley, Wayne R. Hansen | 1997-01-07 |