| 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 |