Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8480376 | Device, computer program product and computer-implemented method for backspin detection in an electrical submersible pump assembly | Dick L. Knox, Robert Allen, William J. Carter, Robert H. McCoy | 2013-07-09 |
| 8400093 | Device, computer program product and computer-implemented method for backspin detection in an electrical submersible pump assembly | Dick L. Knox, Robert H. McCoy | 2013-03-19 |
| 8287246 | Systems and methods for automatic forward phasing determination in a downhole pump system | Sheldon Plitt, Dick L. Knox, William J. Carter | 2012-10-16 |
| 8141646 | Device and method for gas lock detection in an electrical submersible pump assembly | Robert Allen, John M. Leuthen, Dick L. Knox, Tom G. Yohanan, Brown Lyle Wilson +1 more | 2012-03-27 |
| 8125177 | System and method for adding voltages of power modules in variable frequency drives | John M. Leuthen, Jim E. Layton, Dick L. Knox | 2012-02-28 |
| 8092190 | Systems and methods for reducing pump downtime by determining rotation speed using a variable speed drive | John M. Leuthen, Sheldon Plitt, Tom G. Yohanan | 2012-01-10 |
| 8082217 | Multiphase flow meter for electrical submersible pumps using artificial neural networks | Alexander Crossley, De Hao Zhu | 2011-12-20 |
| 7834643 | Systems and methods for reducing distortion in a power source using an active harmonics filter | Tom G. Yohanan, John M. Leuthen, Michael C. Underwood | 2010-11-16 |
| 7798215 | Device, method and program product to automatically detect and break gas locks in an ESP | John M. Leuthen, Brown Lyle Wilson, Bryan D. Schulze | 2010-09-21 |
| 7607896 | Systems and methods for power ride-through in variable speed drives | John M. Leuthen, Dick L. Knox, Tom G. Yohanan | 2009-10-27 |
| 7431093 | Protection scheme and method for deployment of artificial lift devices in a wellbore | John L. Bearden | 2008-10-07 |
| 7048057 | Protection scheme and method for deployment of artificial lift devices in a wellbore | John L. Bearden | 2006-05-23 |
| 6625027 | Method for increasing the dielectric strength of isolated base integrated circuits used with variable frequency drives | Vester Ray Raynor | 2003-09-23 |
| 6586900 | Method for boosting the output voltage of a variable frequency drive | James E. Layton, John M. Leuthen, Dick L. Knox | 2003-07-01 |
| 6587037 | Method for multi-phase data communications and control over an ESP power cable | Gordon Besser, Dick L. Knox, Dan D. Toomey | 2003-07-01 |
| 6167965 | Electrical submersible pump and methods for enhanced utilization of electrical submersible pumps in the completion and production of wellbores | John L. Bearden, John W. Harrell, Gordon Besser, Michael H. Johnson, Paulo Tubel +5 more | 2001-01-02 |
| 4200203 | Control device for batch metering system | — | 1980-04-29 |