Issued Patents All Time
Showing 26–50 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7798215 | Device, method and program product to automatically detect and break gas locks in an ESP | John M. Leuthen, Jerald R. Rider, Bryan D. Schulze | 2010-09-21 |
| 7798211 | Passive gas separator for progressing cavity pumps | Donn J. Brown, Roger D. Stair | 2010-09-21 |
| 7766081 | Gas separator within ESP shroud | Donn J. Brown, Gary L. James | 2010-08-03 |
| 7543633 | Floating shaft gas separator | Donn J. Brown, Matthew R. Porter, Bruce Proctor | 2009-06-09 |
| 7445429 | Crossover two-phase flow pump | Donn J. Brown | 2008-11-04 |
| 7377313 | Gas separator fluid crossover for well pump | Donn J. Brown | 2008-05-27 |
| 7241104 | Two phase flow conditioner for pumping gassy well fluid | Donn J. Brown | 2007-07-10 |
| 7134499 | Rotary and reciprocal well pump system | Donn J. Brown | 2006-11-14 |
| 7055595 | Electrical submersible pump actuated packer | John J. Mack, Donn J. Brown | 2006-06-06 |
| 6932160 | Riser pipe gas separator for well pump | Rick G. Murray, Michael J. Fox, Donn J. Brown | 2005-08-23 |
| 6752560 | Removable splined shaft end for submersible pumps | Terry W. Shafer, John J. Mack | 2004-06-22 |
| 6723158 | Gas separator improvements | Donn J. Brown | 2004-04-20 |
| 6715556 | Gas restrictor for horizontally oriented well pump | John J. Mack | 2004-04-06 |
| 6557905 | Anti-rotational submersible well pump assembly | John J. Mack, Donn J. Brown | 2003-05-06 |
| 6216788 | Sand protection system for electrical submersible pump | — | 2001-04-17 |
| 5845709 | Recirculating pump for electrical submersible pump system | John J. Mack | 1998-12-08 |
| 5622222 | Scavenger system and electrical submersible pumps (ESP's) | Leslie C. Reid, Paul Davis, Terrance P. Comeau | 1997-04-22 |
| 5375656 | Low flow rate oil supply system for an electric submersible pump | — | 1994-12-27 |
| 5160240 | Centrifugal pump with modular bearing support for pumping fluids containing abrasive particles | — | 1992-11-03 |
| 5129452 | Flexible electrical submersible motor pump system for deviated wells | — | 1992-07-14 |
| 5113101 | Watertight seal for plug-in type pothead | Joseph Liu | 1992-05-12 |
| 5033937 | Centrifugal pump with modular bearing support for pumping fluids containing abrasive particles | — | 1991-07-23 |
| 4940911 | Submersible pump equalizer with multiple expanding chambers | — | 1990-07-10 |
| 4872808 | Centrifugal pump modular bearing support for pumping fluids containing abrasive particles | — | 1989-10-10 |
| 4409504 | Tandem connected submersible oil well pump motors | Joseph T. Carle | 1983-10-11 |