Issued Patents 2003
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6615935 | Roller cone bits with wear and fracture resistant surface | Zhigang Fang, Anthony Griffo, Alysia C. White | 2003-09-09 |
| 6571887 | Directional flow nozzle retention body | Quan Nguyen, James L. Larsen, Michael A. Siracki | 2003-06-03 |
| 6561293 | Cutter element with non-linear, expanded crest | James C. Minikus, Stephen C. Steinke, Gary R. Portwood, Gary E. Garcia, David P. Moran +1 more | 2003-05-13 |
| 6536542 | Rock bit seal with multiple dynamic seal surface elements | Zhigang Fang, Nephi M. Mourik, Sujian Huang | 2003-03-25 |
| 6516293 | Method for simulating drilling of roller cone bits and its application to roller cone bit design and performance | Sujian Huang | 2003-02-04 |
| 6510909 | Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty | Gary R. Portwood, Gary E. Garcia, James C. Minikus, Per Ivar Nese, Dennis Cisneros | 2003-01-28 |