Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12352109 | Reamers with improved durability and/or stability | — | 2025-07-08 |
| 11086492 | Method and system for monitoring of drilling parameters | Devanand Ramchune | 2021-08-10 |
| 9644429 | Specialized bit for challenging drilling environments | — | 2017-05-09 |
| 9187958 | Reamer with improved performance characteristics in hard and abrasive formations | — | 2015-11-17 |
| 9074434 | Reamer with improved performance characteristics in hard and abrasive formations | — | 2015-07-07 |
| 8448725 | Impact resistant PDC drill bit | — | 2013-05-28 |
| 8109346 | Drill bit supporting multiple cutting elements with multiple cutter geometries and method of assembly | — | 2012-02-07 |
| 7677333 | Drill bit with multiple cutter geometries | — | 2010-03-16 |
| 7464013 | Dynamically balanced cutting tool system | Sujian Huang, Stuart Oliver | 2008-12-09 |
| 7159487 | Method for making a polycrystalline diamond insert drill bit body | Tommy G. Ray, Youhe Zhang | 2007-01-09 |
| 6823952 | Structure for polycrystalline diamond insert drill bit body | Tommy G. Ray, Youhe Zhang | 2004-11-30 |
| 6808031 | Drill bit having large diameter PDC cutters | David Truax | 2004-10-26 |
| 6729420 | Multi profile performance enhancing centric bit and method of bit design | — | 2004-05-04 |
| 6684967 | Side cutting gage pad improving stabilization and borehole integrity | Peter Chan | 2004-02-03 |
| 6615934 | PDC drill bit having cutting structure adapted to improve high speed drilling performance | — | 2003-09-09 |
| 6564886 | Drill bit with rows of cutters mounted to present a serrated cutting edge | Carl W. Keith, Stephen G. Southland | 2003-05-20 |
| 6308790 | Drag bits with predictable inclination tendencies and behavior | John H. Simmons | 2001-10-30 |
| 6253863 | Side cutting gage pad improving stabilization and borehole integrity | Peter Chan | 2001-07-03 |
| 6164394 | Drill bit with rows of cutters mounted to present a serrated cutting edge | Carl W. Keith, Stephen G. Southland | 2000-12-26 |
| 6148937 | PDC cutter element having improved substrate configuration | Carl W. Keith | 2000-11-21 |
| 5937958 | Drill bits with predictable walk tendencies | Carl W. Keith | 1999-08-17 |
| 5906246 | PDC cutter element having improved substrate configuration | Carl W. Keith, Tommy G. Ray | 1999-05-25 |
| 5833021 | Surface enhanced polycrystalline diamond composite cutters | Ghanshyam Rai, Madapusi K. Keshavan, David Truax, Kuttaripalayam T. Kembaiyan | 1998-11-10 |
| 5607024 | Stability enhanced drill bit and cutting structure having zones of varying wear resistance | Carl W. Keith | 1997-03-04 |
| 5607025 | Drill bit and cutting structure having enhanced placement and sizing of cutters for improved bit stabilization | Carl W. Keith | 1997-03-04 |