Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10190366 | Hybrid drill bits having increased drilling efficiency | Anton F. Zahradnik, Rudolf Carl Pessier, Don Q. Nguyen, Karlos B. Cepeda, Michael S. Damschen +5 more | 2019-01-29 |
| 10072462 | Hybrid drill bits | Anton F. Zahradnik, Rudolf Carl Pessier, Mitchell A. Rothe, Don Q. Nguyen, Karlos B. Cepeda +5 more | 2018-09-11 |
| 9657527 | Drill bits with anti-tracking features | John F. Bradford | 2017-05-23 |
| 9353575 | Hybrid drill bits having increased drilling efficiency | Anton F. Zahradnik, Rudolf Carl Pessier, Don Q. Nguyen, Karlos B. Cepeda, Michael S. Damschen +5 more | 2016-05-31 |
| 8978786 | System and method for adjusting roller cone profile on hybrid bit | Don Q. Nguyen, Anton F. Zahradnik, Rudolf Carl Pessier, Mark P. Blackman, Robert Bradshaw +4 more | 2015-03-17 |
| 8950514 | Drill bits with anti-tracking features | John F. Bradford | 2015-02-10 |
| 8579051 | Anti-tracking spear points for earth-boring drill bits | James Florey | 2013-11-12 |
| 8579050 | Reamer with balanced cutting structure for use in a wellbore | Rudolf Carl Pessier, Scott Allan Young, Mark P. Blackman, Gregory L. Ricks | 2013-11-12 |
| 8448724 | Hole opener with hybrid reaming section | Rudolf Carl Pessier | 2013-05-28 |
| 8347989 | Hole opener with hybrid reaming section and method of making | Rudolf Carl Pessier | 2013-01-08 |
| 8307920 | Roller cone disk with shaped compacts | James L. Overstreet, Thomas M. Stefanik, Shyam Anandampillai, Robert Bradshaw | 2012-11-13 |
| 8191635 | Hole opener with hybrid reaming section | Rudolf Carl Pessier | 2012-06-05 |
| 8047309 | Passive and active up-drill features on fixed cutter earth-boring tools and related systems and methods | James L. Overstreet, Kenneth E. Gilmore, John H. Stevens | 2011-11-01 |
| 8028769 | Reamer with stabilizers for use in a wellbore | Rudolf Carl Pessier, James L. Overstreet | 2011-10-04 |
| 7992658 | Pilot reamer with composite framework | — | 2011-08-09 |
| 7980333 | Bar trimmers on disk bit | James L. Overstreet | 2011-07-19 |
| 7938204 | Reamer with improved hydraulics for use in a wellbore | — | 2011-05-10 |
| 7878274 | Steel tooth disk with hardfacing | James L. Overstreet | 2011-02-01 |
| 7866417 | Self sharpening steel tooth cutting structure | James L. Overstreet | 2011-01-11 |
| 7828089 | Erosion resistant fluid passageways and flow tubes for earth-boring tools, methods of forming the same and earth-boring tools including the same | James Florey | 2010-11-09 |
| 7779937 | Steel tooth bit with scooped teeth profile | David K. Luce | 2010-08-24 |
| 7677338 | System, method, and apparatus for passive and active updrill features on roller cone drill bits | James L. Overstreet, Jeremy K. Morgan | 2010-03-16 |
| 7654346 | Steel tooth drill bit with improved tooth breakage resistance | James L. Overstreet, Kenneth E. Gilmore, Jeremy K. Morgan | 2010-02-02 |
| 7628230 | Wide groove roller cone bit | Rudolf Carl Pessier, James L. Overstreet, Don Q. Nguyen | 2009-12-08 |
| 7621345 | High density row on roller cone bit | Karlos B. Cepeda, James L. Overstreet, Rolf Carl Pessier | 2009-11-24 |