Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11814908 | Formation tester tool | Nanjun Liu, Varun Gupta, Charles C. Kuo | 2023-11-14 |
| 11346162 | Formation tester tool | Nanjun Liu, Varun Gupta, Yu-Hsing Charles Kuo | 2022-05-31 |
| 10132120 | Elastomer-thermally conductive carbon fiber compositions for roller-cone drill bit seals | B. Raghava Reddy, Feng Liang, David P. Duckworth | 2018-11-20 |
| 10047570 | Energized paek seals | — | 2018-08-14 |
| 9988849 | Joints comprising carbon nanoforests | David P. Duckworth, Gary E. Weaver | 2018-06-05 |
| 9677341 | Drill bit with extended life seal | Seth Garrett Anderle, Mark E. Williams, Guy Lefort | 2017-06-13 |
| 9528066 | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations | David P. Duckworth | 2016-12-27 |
| 9493990 | Roller cone drill bits with optimized bearing structures | Shilin Chen | 2016-11-15 |
| 9493723 | High-temperature lubricants comprising elongated carbon nanoparticles for use in subterranean formation operations | David P. Duckworth | 2016-11-15 |
| 8789623 | High performance rock bit grease | David P. Duckworth, Liwen Wei | 2014-07-29 |
| 8459379 | Bearing contact pressure reduction in well tools | Gary E. Weaver | 2013-06-11 |
| 7434632 | Roller cone drill bits with enhanced drilling stability and extended life of associated bearings and seals | Shilin Chen | 2008-10-14 |
| 7360612 | Roller cone drill bits with optimized bearing structures | Shilin Chen | 2008-04-22 |
| 7073611 | Ion-beam assisted deposition of inorganic coatings for elastomeric seal wear resistance improvement | Ronghua Wei | 2006-07-11 |