Issued Patents All Time
Showing 26–50 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10145180 | Hybrid cutting structures with blade undulations | Scott D. McDonough | 2018-12-04 |
| 10125548 | Drill bits with core feature for directional drilling applications and methods of use thereof | — | 2018-11-13 |
| 10030452 | Cutting structures for fixed cutter drill bit and other downhole cutting tools | Bala Durairajan, Madapusi K. Keshavan | 2018-07-24 |
| 9903162 | Spacing of rolling cutters on a fixed cutter bit | Michael A. Siracki | 2018-02-27 |
| 9488009 | Apparatuses and methods for stabilizing downhole tools | Navish Makkar, Brian Cruickshank, Charles H. Dewey | 2016-11-08 |
| 9464490 | Gage cutter protection for drilling bits | Youhe Zhang, Chen Chen, Yuri Burhan | 2016-10-11 |
| 9404312 | Cutting structures for fixed cutter drill bit and other downhole cutting tools | Bala Durairajan, Madapusi K. Keshavan | 2016-08-02 |
| 9366090 | Kerfing hybrid drill bit and other downhole cutting tools | Bala Durairajan, Madapusi K. Keshavan | 2016-06-14 |
| 9347275 | Fixed cutter drill bit with core fragmentation feature | Hemachandar Mada | 2016-05-24 |
| 9145739 | Fixed cutter drill bit for abrasive applications | Carl M. Hoffmaster, Shelton W. Alsup, Thomas W. Oldham, Stuart Oliver, Sidney J. Isnor | 2015-09-29 |
| 9051793 | Apparatuses and methods for stabilizing downhole tools | Navish Makkar, Brian Cruickshank, Charles H. Dewey | 2015-06-09 |
| 9016407 | Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied | Bala Durairajan, Carl M. Hoffmaster | 2015-04-28 |
| 9016409 | Rolling cutter placement on PDC bits | Youhe Zhang | 2015-04-28 |
| 9004199 | Drill bits and methods of manufacturing such drill bits | Yuri Burhan, Gregory T. Lockwood, Jonan Fulencheck | 2015-04-14 |
| 8997895 | System and method for coupling an impregnated drill bit to a whipstock | Shantanu N. Swadi, Philip M. Gregurek, Kenneth M. Nevlud, Charles H. Dewey | 2015-04-07 |
| 8887837 | Cutting structures for fixed cutter drill bit and other downhole cutting tools | Bala Durairajan, Madapusi K. Keshavan | 2014-11-18 |
| 8567534 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same | Youhe Zhang, Yuelin Shen, Madapusi K. Keshavan | 2013-10-29 |
| 8418785 | Fixed cutter bit for directional drilling applications | — | 2013-04-16 |
| 8181723 | Bits and cutting structures | — | 2012-05-22 |
| 8157029 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same | Youhe Zhang, Yuelin Shen, Madapusi K. Keshavan | 2012-04-17 |
| 8100202 | Fixed cutter bit with backup cutter elements on secondary blades | Bala Durairajan, Carl M. Hoffmaster, Kurt T. Bush | 2012-01-24 |
| 7946363 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same | Youhe Zhang, Yuelin Shen, Madapusi K. Keshavan | 2011-05-24 |
| 7836981 | Thermally stable polycrystalline diamond cutting elements and bits incorporating the same | Youhe Zhang, Yuelin Shen, Madapusi K. Keshavan | 2010-11-23 |
| 7798256 | Fixed cutter drill bit for abrasive applications | Carl M. Hoffmaster, Shelton W. Alsup, Thomas W. Oldham, Stuart Oliver, Sidney J. Isnor | 2010-09-21 |
| 7621348 | Drag bits with dropping tendencies and methods for making the same | Carl M. Hoffmaster | 2009-11-24 |