Issued Patents All Time
Showing 126–150 of 214 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8261480 | Rigid composite structure with a superhard interior surface | David R. Hall, Scott Dahlgren, Ronald B. Crockett, Timothy C. Duke, Joshua Sensinger +1 more | 2012-09-11 |
| 8215420 | Thermally stable pointed diamond with increased impact resistance | David R. Hall, Ronald B. Crockett | 2012-07-10 |
| 8020333 | Cylinder with polycrystalline diamond interior | David R. Hall, Ronald B. Crockett, Scott Dahlgren, Timothy C. Duke, Joshua Sensinger +1 more | 2011-09-20 |
| 7997661 | Tapered bore in a pick | David R. Hall, Scott Dahlgren | 2011-08-16 |
| 7984772 | Downhole centrifugal drilling fluid separator | David R. Hall, Scott Dahlgren, David Lundgreen | 2011-07-26 |
| 7980332 | Downhole centrifugal drilling fluid separator | David R. Hall, Scott Dahlgren, David Lundgreen | 2011-07-19 |
| 7954401 | Method of assembling a drill bit with a jack element | David R. Hall, Francis Leany, Tyson J. Wilde | 2011-06-07 |
| 7950746 | Attack tool for degrading materials | David R. Hall, Ronald B. Crockett, Jeff Jepson, Michael Barnhill | 2011-05-31 |
| 7938203 | Downhole centrifugal drilling fluid separator | David R. Hall, Scott Dahlgren, David Lundgreen | 2011-05-10 |
| 7852232 | Downhole tool adapted for telemetry | David R. Hall | 2010-12-14 |
| 7753303 | Rotary shaft impactor | David R. Hall, Ronald B. Crockett | 2010-07-13 |
| 7753144 | Drill bit with a retained jack element | David R. Hall, Francis Leany, Tyson J. Wilde, Boyd Black | 2010-07-13 |
| 7696900 | Apparatus for responding to an anomalous change in downhole pressure | David R. Hall, Tyson J. Wilde, Jonathan S. Barlow | 2010-04-13 |
| 7656309 | System and method for sharing information between downhole drill strings | David R. Hall | 2010-02-02 |
| 7647977 | Borehole liner | David R. Hall, John Fernandez | 2010-01-19 |
| 7598886 | System and method for wirelessly communicating with a downhole drill string | David R. Hall, Christopher Durrand, Paula Turner | 2009-10-06 |
| 7591327 | Drilling at a resonant frequency | David R. Hall, John Balley, Matt Kudla | 2009-09-22 |
| 7575425 | Assembly for HPHT processing | David R. Hall, Ronald B. Crockett, Jacob S. Waldron | 2009-08-18 |
| 7572134 | Centering assembly for an electric downhole connection | David R. Hall, Christopher Durrand, Tyson J. Wilde | 2009-08-11 |
| 7571780 | Jack element for a drill bit | David R. Hall, Francis Leany, Tyson J. Wilde | 2009-08-11 |
| 7568770 | Superhard composite material bonded to a steel body | David R. Hall, Ronald B. Crockett, Jeff Jepson | 2009-08-04 |
| 7527110 | Percussive drill bit | David R. Hall, Ronald B. Crockett, John Bailey | 2009-05-05 |
| 7528736 | Loaded transducer for downhole drilling components | David R. Hall, Jeffery E. Daly | 2009-05-05 |
| 7523794 | Wear resistant assembly | David R. Hall, Jeff Jepson, Ronald B. Crockett, John Bailey | 2009-04-28 |
| 7511598 | Element for use in an inductive coupler for downhole components | David R. Hall | 2009-03-31 |