Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |