| 7195067 |
Method and apparatus for well perforating |
Kevin R. Manke, Matthew Todd Howell |
2007-03-27 |
| 7168494 |
Dissolvable downhole tools |
Philip M. Starr, Loren Swor |
2007-01-30 |
| 7048066 |
Downhole sealing tools and method of use |
Paul D. Ringgenberg, Gregory W. Vargus, Lee W. Stepp, Donald R. Smith, Ronald L. Hinkie |
2006-05-23 |
| 6976534 |
Slip element for use with a downhole tool and a method of manufacturing same |
Mike Sutton, Donald W. Winslow, Donald R. Smith |
2005-12-20 |
| 6966386 |
Downhole sealing tools and method of use |
Paul D. Ringgenberg, Gregory W. Vargus, Lee W. Stepp, Donald R. Smith, Ronald L. Hinkie |
2005-11-22 |
| 6896061 |
Multiple zones frac tool |
Iosif Hriscu, Gregory W. Vargus, Thomas W. Hawkins, John T. Brandell |
2005-05-24 |
| 6666266 |
Screw-driven wellhead isolation tool |
Phillip M. Starr, Lee W. Stepp |
2003-12-23 |
| 6666275 |
Bridge plug |
Kenneth G. Neal, Kevin T. Berscheidt, Ronald L. Hinkie, Loren Swor, Brian K. Wilkinson |
2003-12-23 |
| 6491116 |
Frac plug with caged ball |
Kevin T. Berscheidt, Donald R. Smith, Lee W. Stepp, Gregory W. Vargus |
2002-12-10 |
| 6394180 |
Frac plug with caged ball |
Kevin T. Berscheidt, Donald R. Smith, Lee W. Stepp, Gregory W. Vargus |
2002-05-28 |