Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7377332 | Multiple inserts of different geometry in a single row of a bit | Scott D. McDonough | 2008-05-27 |
| 7370711 | Rolling cone drill bit having non-circumferentially arranged cutter elements | — | 2008-05-13 |
| 7341119 | Hydro-lifter rock bit with PDC inserts | Quan Nguyen, Sujian Huang | 2008-03-11 |
| 7320375 | Split cone bit | — | 2008-01-22 |
| 7302374 | Method of designing a drill bit, and bits made using said method | Sujian Huang, Scott D. McDonough | 2007-11-27 |
| 7292967 | Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs | Scott D. McDonough, Daniel W. Brietzke | 2007-11-06 |
| 7234549 | Methods for evaluating cutting arrangements for drill bits and their application to roller cone drill bit designs | Scott D. McDonough, Daniel W. Brietzke | 2007-06-26 |
| 7195078 | Multiple inserts of different geometry in a single row of a bit | Scott D. McDonough | 2007-03-27 |
| 7059430 | Hydro-lifter rock bit with PDC inserts | Quan Nguyen, Sujian Huang | 2006-06-13 |
| 6997273 | Blunt faced cutter element and enhanced drill bit and cutting structure | — | 2006-02-14 |
| 6948403 | Bowed crests for milled tooth bits | — | 2005-09-27 |
| 6856949 | Wear compensated roller cone drill bits | Sujian Huang | 2005-02-15 |
| 6827161 | Roller cone drill bit having non-axisymmetric cutting elements oriented to optimize drilling performance | Sujian Huang, Scott D. McDonough | 2004-12-07 |
| 6823951 | Arcuate-shaped inserts for drill bits | Zhou Yong, Jim Minikus | 2004-11-30 |
| 6786288 | Cutting structure for roller cone drill bits | — | 2004-09-07 |
| 6725952 | Bowed crests for milled tooth bits | — | 2004-04-27 |
| 6688410 | Hydro-lifter rock bit with PDC inserts | Quan Nguyen, Sujian Huang | 2004-02-10 |
| 6637527 | Cutting structure for roller cone drill bits | Sujian Huang | 2003-10-28 |
| 6619411 | Design of wear compensated roller cone drill bits | Sujian Huang | 2003-09-16 |
| 6612384 | Cutting structure for roller cone drill bits | Ying Xiang, Sujian Huang | 2003-09-02 |
| 6604587 | Flat profile cutting structure for roller cone drill bits | Sujian Huang | 2003-08-12 |
| 6601660 | Cutting structure for roller cone drill bits | Ying Xiang, Sujian Huang | 2003-08-05 |
| 6533051 | Roller cone drill bit shale diverter | Dennis Cisneros, Sujian Huang, Quan Nguyen | 2003-03-18 |
| 6530441 | Cutting element geometry for roller cone drill bit | Sujian Huang | 2003-03-11 |
| 6527068 | Roller cone drill bit having non-axisymmetric cutting elements oriented to optimize drilling performance | Sujian Huang, Scott D. McDonough | 2003-03-04 |