Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7726415 | Fixed cutter drill bit | Robert George Tipton, Gerald A. Strenk, Jr. | 2010-06-01 |
| 6926099 | Drill out bi-center bit and method for using same | Gary M. Thigpen | 2005-08-09 |
| 6918455 | Drill bit with large inserts | John Adam Meyers, Huy D. Bui | 2005-07-19 |
| 6904983 | Low-contact area cutting element | Gary M. Thigpen, Bruno Cuillier | 2005-06-14 |
| 6568492 | Drag-type casing mill/drill bit | Gary M. Thigpen | 2003-05-27 |
| 6564886 | Drill bit with rows of cutters mounted to present a serrated cutting edge | Graham Mensa-Wilmot, Stephen G. Southland | 2003-05-20 |
| 6164394 | Drill bit with rows of cutters mounted to present a serrated cutting edge | Graham Mensa-Wilmot, Stephen G. Southland | 2000-12-26 |
| 6148937 | PDC cutter element having improved substrate configuration | Graham Mensa-Wilmot | 2000-11-21 |
| 5937958 | Drill bits with predictable walk tendencies | Graham Mensa-Wilmot | 1999-08-17 |
| 5906246 | PDC cutter element having improved substrate configuration | Graham Mensa-Wilmot, Tommy G. Ray | 1999-05-25 |
| 5737980 | Brazing receptacle for improved PCD cutter retention | Gary Chunn, Mark A. Johnson | 1998-04-14 |
| 5607024 | Stability enhanced drill bit and cutting structure having zones of varying wear resistance | Graham Mensa-Wilmot | 1997-03-04 |
| 5607025 | Drill bit and cutting structure having enhanced placement and sizing of cutters for improved bit stabilization | Graham Mensa-Wilmot | 1997-03-04 |
| 5592996 | Drill bit having improved cutting structure with varying diamond density | Graham Mensa-Wilmot | 1997-01-14 |
| 5582261 | Drill bit having enhanced cutting structure and stabilizing features | Graham Mensa-Wilmot | 1996-12-10 |
| 5551522 | Drill bit having stability enhancing cutting structure | Graham Mensa-Wilmot | 1996-09-03 |
| 5549171 | Drill bit with performance-improving cutting structure | Graham Mensa-Wilmot | 1996-08-27 |
| 5346025 | Drill bit with improved insert cutter pattern and method of drilling | Ed Martin | 1994-09-13 |
| 5265685 | Drill bit with improved insert cutter pattern | Ed Martin | 1993-11-30 |
| 5238075 | Drill bit with improved cutter sizing pattern | Robert I. Clayton | 1993-08-24 |
| 5099929 | Unbalanced PDC drill bit with right hand walk tendencies, and method of drilling right hand bore holes | William W. King, Robert I. Clayton | 1992-03-31 |
| 5090492 | Drill bit with vibration stabilizers | — | 1992-02-25 |
| 4911254 | Polycrystalline diamond cutting element with mating recess | — | 1990-03-27 |