| 9109403 |
Drill bit assembly having electrically isolated gap joint for electromagnetic telemetry |
Garry Holmen, Tony Dopf, Aaron W. Logan, Rob Utter, Brian Clark +1 more |
2015-08-18 |
| 9022144 |
Drill bit assembly having electrically isolated gap joint for measurement of reservoir properties |
Brian Clark, Reza Taherian, Garry Holmen, Anthony R. Dopf, Aaron W. Logan +1 more |
2015-05-05 |
| 9004196 |
Drill bit assembly having aligned features |
Kjell Haugvaldstad, Garry Holmen, Tony Dopf, Aaron W. Logan, Rob Utter |
2015-04-14 |
| 8648733 |
Electromagnetic telemetry assembly with protected antenna |
Anthony R. Dopf, Garry Holmen |
2014-02-11 |
| 8624464 |
Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors |
Anthony R. Dopf, Paul L. Camwell, Timothy Neff |
2014-01-07 |
| 8308199 |
Electrical isolation connector for electromagnetic gap sub |
Paul L. Camwell, David D. Whalen, Thomas H. Vermeeren, Anthony R. Dopf |
2012-11-13 |
| 8270251 |
Acoustic isolator |
Douglas S. Drumheller, Paul L. Camwell, Anthony R. Dopf |
2012-09-18 |
| 8115651 |
Drill string telemetry methods and apparatus |
Paul L. Camwell, James M. Neff |
2012-02-14 |
| 7900968 |
Electrical isolation connector for electromagnetic gap sub |
Paul L. Camwell, David D. Whalen, Thomas H. Vermeeren, Anthony R. Dopf |
2011-03-08 |
| 7839719 |
Fluid erosion protection washer for rotating shaft in MWD tool |
Anthony R. Dopf, Trang Le, Timothy Neff, Wendall Siemens, Dave Switzer |
2010-11-23 |
| 7821178 |
Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors |
Paul L. Camwell, Anthony R. Dopf, Timothy Neff |
2010-10-26 |
| 7532540 |
Fluid erosion protection washer for rotating shaft in MWD tool |
Anthony R. Dopf, Trang Le, Timothy Neff, Wendall Siemens, Dave Switzer |
2009-05-12 |
| 7462957 |
Multi-conductor plug and socket apparatus |
Paul L. Camwell, Wendall Siemens, Jili Liu |
2008-12-09 |
| 7252160 |
Electromagnetic gap sub assembly |
Tony Dopf, Paul L. Camwell, Michael Nero, Clemens Horst, Robert E. Smallwood |
2007-08-07 |
| D532602 |
Tool taxi |
Peter Russo, Patricia Sylvia, Luc Lam |
2006-11-28 |
| 6956791 |
Apparatus for receiving downhole acoustic signals |
Anthony R. Dopf, Paul L. Camwell, Wendall Siemens |
2005-10-18 |
| 6902414 |
Harsh environment rotatable connector |
Anthony R. Dopf, David A. Switzer |
2005-06-07 |
| 6367323 |
Dynamic pressure device for oil drill systems |
Paul L. Camwell, Michael T. Sutherland, Anthony R. Dopf, Randall S. Liscombe |
2002-04-09 |
| 6158532 |
Subassembly electrical isolation connector for drill rod |
Anthony R. Dopf, Paul L. Camwell |
2000-12-12 |
| 6050353 |
Subassembly electrical isolation connector for drill rod |
Anthony R. Dopf, Paul L. Camwell |
2000-04-18 |
