Issued Patents All Time
Showing 51–75 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8365821 | System for a downhole string with a downhole valve | David R. Hall, Dahlgren Scott | 2013-02-05 |
| 8365842 | Ratchet mechanism in a fluid actuated device | David R. Hall, Scott Dahlgren | 2013-02-05 |
| 8353354 | Crawler system for an earth boring system | David R. Hall, Scott Dahlgren | 2013-01-15 |
| 8342266 | Timed steering nozzle on a downhole drill bit | David R. Hall, Scott Dahlgren | 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, Scott Dahlgren | 2012-12-18 |
| 8297375 | Downhole turbine | David R. Hall, Scott Dahlgren | 2012-10-30 |
| 8297378 | Turbine driven hammer that oscillates at a constant frequency | David R. Hall, Scott Dahlgren | 2012-10-30 |
| 8281880 | Expandable tool for an earth boring system | David R. Hall, Scott Dahlgren | 2012-10-09 |
| 8267196 | Flow guide actuation | David R. Hall, Scott Dahlgren, Paula Turner, Christopher Durrand | 2012-09-18 |
| 8225883 | Downhole percussive tool with alternating pressure differentials | David R. Hall, Scott Dahlgren | 2012-07-24 |
| 8201645 | Downhole tool string component that is protected from drilling stresses | David R. Hall, Nathan Nelson, Scott Richard Woolston, Scott Dahlgren | 2012-06-19 |
| 8172009 | Expandable tool with at least one blade that locks in place through a wedging effect | David R. Hall, Scott Dahlgren | 2012-05-08 |
| 8061784 | Retention system | David R. Hall, Scott Dahlgren, Italo Elqueta, Tyson J. Wilde, Christopher Durrand | 2011-11-22 |
| 8033330 | Tool string threads | David R. Hall, Scott Dahlgren | 2011-10-11 |
| 8033615 | Retention system | David R. Hall, Scott Dahlgren, Italo Elqueta, Tyson J. Wilde, Christopher Durrand | 2011-10-11 |
| 8007051 | Shank assembly | David R. Hall, Ronald B. Crockett, Jeff Jepson, Tyson J. Wilde, Jad A. Mills +1 more | 2011-08-30 |
| 7946656 | Retention system | David R. Hall, Scott Dahlgren, Italo Elqueta, Tyson J. Wilde, Christopher Durrand | 2011-05-24 |
| 7934570 | Data and/or PowerSwivel | David R. Hall, Scott Dahlgren | 2011-05-03 |
| 7730975 | Drill bit porting system | David R. Hall, Scott Dahlgren | 2010-06-08 |
| 7730972 | Downhole turbine | David R. Hall, Scott Dahlgren | 2010-06-08 |
| 7661487 | Downhole percussive tool with alternating pressure differentials | David R. Hall, Scott Dahlgren | 2010-02-16 |
| 7648210 | Pick with an interlocked bolster | David R. Hall, Scott Dahlgren | 2010-01-19 |
| 7624821 | Constricting flow diverter | David R. Hall, Scott Dahlgren | 2009-12-01 |
| 7537053 | Downhole electrical connection | David R. Hall, Scott Dahlgren, Tyson J. Wilde | 2009-05-26 |
| 7537051 | Downhole power generation assembly | David R. Hall, Scott Dahlgren, Tyson J. Wilde | 2009-05-26 |