Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7828301 | Self-energized backup ring for annular seals | Michael Briscoe, David Pixton | 2010-11-09 |
| 7303029 | Filter for a drill string | David R. Hall, David Pixton, Michael Briscoe | 2007-12-04 |
| 7275594 | Stab guide | David R. Hall, Patrick J. Hannigan | 2007-10-02 |
| 7193527 | Swivel assembly | David R. Hall, David Pixton, Michael Briscoe, Kline Bradford, Michael Rawle +1 more | 2007-03-20 |
| 6991035 | Drilling jar for use in a downhole network | David R. Hall, Joe Fox, David Pixton, Michael Briscoe | 2006-01-31 |
| 4789251 | Cooling networks for PCD bearing surfaces | David R. Hall | 1988-12-06 |
| 4764036 | PCD enhanced radial bearing | — | 1988-08-16 |
| 4720199 | Bearing structure for downhole motors | Bela Geczy, Robert G. Toth | 1988-01-19 |
| 4708496 | Diamond bearing and manufacture thereof | — | 1987-11-24 |