Issued Patents 2011
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8066500 | High pressure, high temperature back-up with a circumferential relief | David R. Hall | 2011-11-29 |
| 8061784 | Retention system | David R. Hall, Jonathan Marshall, Italo Elqueta, Tyson J. Wilde, Christopher Durrand | 2011-11-22 |
| 8061782 | Sensors on a degradation machine | David R. Hall, David Wahlquist, Thomas Morris | 2011-11-22 |
| 8033328 | Downhole electric power generator | David R. Hall, Michael Comfoltey | 2011-10-11 |
| 8033615 | Retention system | David R. Hall, Jonathan Marshall, Italo Elqueta, Tyson J. Wilde, Christopher Durrand | 2011-10-11 |
| 8033330 | Tool string threads | David R. Hall, Jonathan Marshall | 2011-10-11 |
| 8029068 | Locking fixture for a degradation assembly | David R. Hall | 2011-10-04 |
| 8028774 | Thick pointed superhard material | David R. Hall, Ronald B. Crockett, Jeff Jepson, John Bailey | 2011-10-04 |
| 8020333 | Cylinder with polycrystalline diamond interior | David R. Hall, Ronald B. Crockett, Timothy C. Duke, Joshua Sensinger, Joe Fox +1 more | 2011-09-20 |
| 8011457 | Downhole hammer assembly | David R. Hall, John Bailey | 2011-09-06 |
| 8007051 | Shank assembly | David R. Hall, Ronald B. Crockett, Jeff Jepson, Tyson J. Wilde, Jad A. Mills +1 more | 2011-08-30 |
| 7997661 | Tapered bore in a pick | David R. Hall, Joe Fox | 2011-08-16 |
| 7992945 | Hollow pick shank | David R. Hall, Ronald B. Crockett, Jeff Jepson | 2011-08-09 |
| 7984772 | Downhole centrifugal drilling fluid separator | David R. Hall, Joe Fox, David Lundgreen | 2011-07-26 |
| 7980332 | Downhole centrifugal drilling fluid separator | David R. Hall, Joe Fox, David Lundgreen | 2011-07-19 |
| 7963617 | Degradation assembly | David R. Hall, Ronald B. Crockett | 2011-06-21 |
| 7946656 | Retention system | David R. Hall, Jonathan Marshall, Italo Elqueta, Tyson J. Wilde, Christopher Durrand | 2011-05-24 |
| 7946657 | Retention for an insert | David R. Hall | 2011-05-24 |
| 7938203 | Downhole centrifugal drilling fluid separator | David R. Hall, Joe Fox, David Lundgreen | 2011-05-10 |
| 7934570 | Data and/or PowerSwivel | David R. Hall, Jonathan Marshall | 2011-05-03 |
| 7887142 | Sensors on a degradation machine | David R. Hall, David Wahlquist, Thomas Morris | 2011-02-15 |
| 7871133 | Locking fixture | David R. Hall | 2011-01-18 |