Issued Patents All Time
Showing 51–68 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6612384 | Cutting structure for roller cone drill bits | Amardeep Singh, Ying Xiang | 2003-09-02 |
| 6604587 | Flat profile cutting structure for roller cone drill bits | Amardeep Singh | 2003-08-12 |
| 6601660 | Cutting structure for roller cone drill bits | Ying Xiang, Amardeep Singh | 2003-08-05 |
| 6536542 | Rock bit seal with multiple dynamic seal surface elements | Zhigang Fang, Chris E. Cawthorne, Nephi M. Mourik | 2003-03-25 |
| 6533051 | Roller cone drill bit shale diverter | Amardeep Singh, Dennis Cisneros, Quan Nguyen | 2003-03-18 |
| 6530441 | Cutting element geometry for roller cone drill bit | Amardeep Singh | 2003-03-11 |
| 6527068 | Roller cone drill bit having non-axisymmetric cutting elements oriented to optimize drilling performance | Amardeep Singh, Scott D. McDonough | 2003-03-04 |
| 6516293 | Method for simulating drilling of roller cone bits and its application to roller cone bit design and performance | Chris E. Cawthorne | 2003-02-04 |
| 6439326 | Centered-leg roller cone drill bit | Chris E. Cawthorne | 2002-08-27 |
| 6374930 | Cutting structure for roller cone drill bits | Amardeep Singh | 2002-04-23 |
| 6361873 | Composite constructions having ordered microstructures | Zhou Yong, Michael A. Siracki, Chris E. Cawthorne, J. Albert Sue, Ghanshyam Rai +1 more | 2002-03-26 |
| 6315065 | Drill bit inserts with interruption in gradient of properties | Zhou Yong | 2001-11-13 |
| 6179296 | Dual functioning seal for rock bits | Chris E. Cawthorne, Zhigang Fang, Michael A. Siracki | 2001-01-30 |
| 6170830 | Dual functioning seal for rock bits | Chris E. Cawthorne, Zhigang Fang, Michael A. Siracki | 2001-01-09 |
| 6170582 | Rock bit cone retention system | Amardeep Singh, Steve Peterson | 2001-01-09 |
| 6123337 | Composite earth boring bit seal | Zhigang Fang, Chris E. Cawthorne, Brian A. James, G. Steve Kyker, Robert Denton +1 more | 2000-09-26 |
| 5842700 | Composite rock bit seal | Zhigang Fang, Chris E. Cawthorne, Brian A. James, G. Steven Kyker, Robert Denton | 1998-12-01 |
| 5842701 | Dual functioning seal for rock bits | Chris E. Cawthorne, Zhigang Fang, Michael A. Siracki | 1998-12-01 |