Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9291019 | Systems and methods to inhibit packoff formation during drilling assembly removal from a wellbore | Pietro Valsecchi, Jon M. Wallace, Fuping Zhou | 2016-03-22 |
| 8672057 | Method for controlling loss of drilling fluid | Fred E. Dupriest, Martin V. Smith, Sabine C. Zeilinger | 2014-03-18 |
| 8393411 | Method for controlling loss of drilling fluid | Fred E. Dupriest, Martin V. Smith, Sabine C. Zeilinger | 2013-03-12 |