Issued Patents All Time
Showing 26–50 of 138 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8365842 | Ratchet mechanism in a fluid actuated device | David R. Hall, Jonathan Marshall | 2013-02-05 |
| 8353354 | Crawler system for an earth boring system | David R. Hall, Jonathan Marshall | 2013-01-15 |
| 8342266 | Timed steering nozzle on a downhole drill bit | David R. Hall, Jonathan Marshall | 2013-01-01 |
| 8333254 | Steering mechanism with a ring disposed about an outer diameter of a drill bit and method for drilling | David R. Hall, Jonathan Marshall | 2012-12-18 |
| 8297378 | Turbine driven hammer that oscillates at a constant frequency | David R. Hall, Jonathan Marshall | 2012-10-30 |
| 8297375 | Downhole turbine | David R. Hall, Jonathan Marshall | 2012-10-30 |
| 8281880 | Expandable tool for an earth boring system | David R. Hall, Jonathan Marshall | 2012-10-09 |
| 8267196 | Flow guide actuation | David R. Hall, Paula Turner, Christopher Durrand, Jonathan Marshall | 2012-09-18 |
| 8261480 | Rigid composite structure with a superhard interior surface | David R. Hall, Ronald B. Crockett, Timothy C. Duke, Joshua Sensinger, Joe Fox +1 more | 2012-09-11 |
| 8225883 | Downhole percussive tool with alternating pressure differentials | David R. Hall, Jonathan Marshall | 2012-07-24 |
| 8201645 | Downhole tool string component that is protected from drilling stresses | David R. Hall, Nathan Nelson, Scott Richard Woolston, Jonathan Marshall | 2012-06-19 |
| 8172009 | Expandable tool with at least one blade that locks in place through a wedging effect | David R. Hall, Jonathan Marshall | 2012-05-08 |
| 8130118 | Wired tool string component | David R. Hall, Paul Schramm | 2012-03-06 |
| 8123302 | Impact tool | David R. Hall, Ronald B. Crockett, Tyson J. Wilde | 2012-02-28 |
| 8109349 | Thick pointed superhard material | David R. Hall, Ronald B. Crockett, John Bailey, Jeff Jepson | 2012-02-07 |
| 8091627 | Stress relief in a pocket of a downhole tool string component | David R. Hall, Paula Turner | 2012-01-10 |
| 8066500 | High pressure, high temperature back-up with a circumferential relief | David R. Hall | 2011-11-29 |
| 8061782 | Sensors on a degradation machine | David R. Hall, David Wahlquist, Thomas Morris | 2011-11-22 |
| 8061784 | Retention system | David R. Hall, Jonathan Marshall, Italo Elqueta, Tyson J. Wilde, Christopher Durrand | 2011-11-22 |
| 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 |
| 8033328 | Downhole electric power generator | David R. Hall, Michael Comfoltey | 2011-10-11 |
| 8028774 | Thick pointed superhard material | David R. Hall, Ronald B. Crockett, Jeff Jepson, John Bailey | 2011-10-04 |
| 8029068 | Locking fixture for a degradation assembly | David R. Hall | 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 |