Issued Patents All Time
Showing 76–100 of 137 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6966386 | Downhole sealing tools and method of use | Gregory W. Vargus, Lee W. Stepp, Donald R. Smith, Ronald L. Hinkie, Don S. Folds | 2005-11-22 |
| 6848189 | Method and apparatus for measuring a distance | Gordon L. Moake | 2005-02-01 |
| 6768214 | Vibration based power generator | Roger L. Schultz, Robert Michael, Clark E. Robison | 2004-07-27 |
| 6755249 | Apparatus and method for perforating a subterranean formation | Clark E. Robison, Robert C. Pahmiyer | 2004-06-29 |
| 6729398 | Methods of downhole testing subterranean formations and associated apparatus therefor | Mark A. Proett, Michael T. Pelletier, Michael L. Hinz, Gregory N. Gilbert, Harold W. Nivens +1 more | 2004-05-04 |
| 6536530 | Hydraulic control system for downhole tools | Roger L. Schultz, Jimmie R. Williamson, Jr. | 2003-03-25 |
| 6527052 | Methods of downhole testing subterranean formations and associated apparatus therefor | Mark A. Proett, Michael T. Pelletier, Michael L. Hinz, Gregory N. Gilbert, Harold W. Nivens +1 more | 2003-03-04 |
| 6504258 | Vibration based downhole power generator | Roger L. Schultz, Clark E. Robison, Robert Michael, Russell Irving Bayh, III | 2003-01-07 |
| 6446719 | Methods of downhole testing subterranean formations and associated apparatus therefor | Mark A. Proett, Michael T. Pelletier, Michael L. Hinz, Gregory N. Gilbert, Harold W. Nivens +1 more | 2002-09-10 |
| 6446720 | Methods of downhole testing subterranean formations and associated apparatus therefor | Mark A. Proett, Michael T. Pelletier, Michael L. Hinz, Gregory N. Gilbert, Harold W. Nivens +1 more | 2002-09-10 |
| 6439324 | Electrically insulating gap subassembly for downhole electromagnetic transmission | Harrison C. Smith | 2002-08-27 |
| 6435282 | Annular flow safety valve and methods | Clark E. Robison | 2002-08-20 |
| 6343650 | Test, drill and pull system and method of testing and drilling a well | — | 2002-02-05 |
| 6328103 | Methods and apparatus for downhole completion cleanup | Robert C. Pahmiyer | 2001-12-11 |
| 6325146 | Methods of downhole testing subterranean formations and associated apparatus therefor | Mark A. Proett, Michael T. Pelletier, Michael L. Hinz, Gregory N. Gilbert, Harold W. Nivens +1 more | 2001-12-04 |
| 6236620 | Integrated well drilling and evaluation | Roger L. Schultz, H. Kent Beck, J. Allan Clark, Kevin R. Manke | 2001-05-22 |
| 6230811 | Internal pressure operated circulating valve with annulus pressure operated safety mandrel | Michael E. Norman | 2001-05-15 |
| 6177882 | Electromagnetic-to-acoustic and acoustic-to-electromagnetic repeaters and methods for use of same | Harrison C. Smith | 2001-01-23 |
| 6109354 | Circulating valve responsive to fluid flow rate therethrough and associated methods of servicing a well | Neal G. Skinner | 2000-08-29 |
| 6098727 | Electrically insulating gap subassembly for downhole electromagnetic transmission | Harrison C. Smith | 2000-08-08 |
| 6018501 | Subsea repeater and method for use of the same | Harrison C. Smith | 2000-01-25 |
| 5965964 | Method and apparatus for a downhole current generator | Neal G. Skinner | 1999-10-12 |
| 5942990 | Electromagnetic signal repeater and method for use of same | Harrison C. Smith | 1999-08-24 |
| 5890542 | Apparatus for early evaluation formation testing | — | 1999-04-06 |
| 5826662 | Apparatus for testing and sampling open-hole oil and gas wells | Harold Kent Beck, Roger L. Schultz, Rodney R. Setliff | 1998-10-27 |