Issued Patents All Time
Showing 101–125 of 138 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6401529 | Apparatus and method for determining constituent composition of a produced fluid | Clark E. Robison, Charles R. Williams | 2002-06-11 |
| 6397950 | Apparatus and method for removing a frangible rupture disc or other frangible device from a wellbore casing | Steven G. Streich, James C. Tucker, James R. Birchak, Paul F. Rodney | 2002-06-04 |
| 6384738 | Pressure impulse telemetry apparatus and method | Kenneth J. Carstensen, Charles M. Pool | 2002-05-07 |
| 6355928 | Fiber optic tomographic imaging of borehole fluids | Gerald Gardner, Margaret C. Waid, Wallace R. Gardner, John W. Minear | 2002-03-12 |
| 6340062 | Early formation evaluation tool | — | 2002-01-22 |
| 6321838 | Apparatus and methods for acoustic signaling in subterranean wells | — | 2001-11-27 |
| 6233746 | Multiplexed fiber optic transducer for use in a well and method | — | 2001-05-22 |
| 6216782 | Apparatus and method for verification of monophasic samples | — | 2001-04-17 |
| 6155608 | Self-locking connector | Don L. Weeks | 2000-12-05 |
| 6148919 | Apparatus having a releasable lock | Wesley J. Burris, II | 2000-11-21 |
| 6144316 | Electromagnetic and acoustic repeater and method for use of same | — | 2000-11-07 |
| 6109354 | Circulating valve responsive to fluid flow rate therethrough and associated methods of servicing a well | Paul D. Ringgenberg | 2000-08-29 |
| 6026915 | Early evaluation system with drilling capability | Harrison C. Smith | 2000-02-22 |
| 6006834 | Formation evaluation testing apparatus and associated methods | — | 1999-12-28 |
| 6000470 | Self-locking connector | Don L. Weeks | 1999-12-14 |
| 5965964 | Method and apparatus for a downhole current generator | Paul D. Ringgenberg | 1999-10-12 |
| 5813460 | Formation evaluation tool and method for use of the same | Paul D. Ringgenberg, Roger L. Schultz, Margaret C. Waid, Curtis E. Wendler, Robert W. Srubar | 1998-09-29 |
| 5807082 | Automatic downhole pump assembly and method for operating the same | Paul D. Ringgenberg | 1998-09-15 |
| 5799733 | Early evaluation system with pump and method of servicing a well | Paul D. Ringgenberg, Curtis E. Wendler, Roger L. Schultz, Robert W. Srubar, Margaret C. Waid | 1998-09-01 |
| 5791414 | Early evaluation formation testing system | Paul D. Ringgenberg | 1998-08-11 |
| 5782302 | Apparatus and method for loading fluid into subterranean formations | Paul D. Ringgenberg | 1998-07-21 |
| 5754495 | Method for acoustic determination of the length of a fluid conduit | — | 1998-05-19 |
| 5490564 | Pressure change signals for remote control of downhole tools | Roger L. Schultz, Donald G. Kyle | 1996-02-13 |
| 5355960 | Pressure change signals for remote control of downhole tools | Roger L. Schultz, Donald G. Kyle | 1994-10-18 |
| 5251703 | Hydraulic system for electronically controlled downhole testing tool | — | 1993-10-12 |