Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8590382 | Method for evaluating shaped charge perforation test cores using computer tomographic images thereof | Avrami Grader, Henrique Tono | 2013-11-26 |
| 8583410 | Method for obtaining consistent and integrated physical properties of porous media | Carl Sisk | 2013-11-12 |
| 8172008 | Drilling apparatus with reduced exposure of cutters and methods of drilling | Mark W. Dykstra, William Heuser, Michael L. Doster, Jack T. Oldham, Terry D. Watts +3 more | 2012-05-08 |
| 8066084 | Drilling apparatus with reduced exposure of cutters and methods of drilling | Mark W. Dykstra, William Heuser, Michael L. Doster, Jack T. Oldham, Terry D. Watts +3 more | 2011-11-29 |
| 7814990 | Drilling apparatus with reduced exposure of cutters and methods of drilling | Mark W. Dykstra, William Heuser, Michael L. Doster, Jack T. Oldham, Terry D. Watts +3 more | 2010-10-19 |
| 7096978 | Drill bits with reduced exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Jack T. Oldham, Terry D. Watts +3 more | 2006-08-29 |
| 7066280 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa, Timothy K. Marvel +1 more | 2006-06-27 |
| 6935441 | Drill bits with reduced exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Jack T. Oldham, Terry D. Watts +3 more | 2005-08-30 |
| 6779613 | Drill bits with controlled exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Jack T. Oldham, Terry D. Watts +3 more | 2004-08-24 |
| 6626251 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa, Chih Lin | 2003-09-30 |
| 6571886 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa, Timothy K. Marvel +1 more | 2003-06-03 |
| 6543312 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa, Chih Lin | 2003-04-08 |
| 6540033 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa, Chih Lin | 2003-04-01 |
| 6460631 | Drill bits with reduced exposure of cutters | Mark W. Dykstra, William Heuser, Michael L. Doster, Jack T. Oldham, Terry D. Watts +3 more | 2002-10-08 |
| 6419032 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa, Chih Lin | 2002-07-16 |
| 6230822 | Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations | Eric C. Sullivan, Scott Ray Schmidt, Don Q. Nguyen, Glenn R. Zadrapa, Chih Lin | 2001-05-15 |
| 5813480 | Method and apparatus for monitoring and recording of operating conditions of a downhole drill bit during drilling operations | Scott Ray Schmidt | 1998-09-29 |