Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12421801 | Drill bit for use with intensified fluid pressures | Gary R. Portwood, Luca Tedeschi, Alessandro Bertini, Simone Pallesi, Johann Obermair +1 more | 2025-09-23 |
| 12037850 | Drill bit for use with intensified fluid pressures | Gary R. Portwood, Luca Tedeschi, Alessandro Bertini, Simone Pallesi, Johann Obermair +1 more | 2024-07-16 |
| 11512536 | Drill bit for use with intensified fluid pressures | Gary R. Portwood, Luca Tedeschi, Alessandro Bertini, Simone Pallesi, Johann Obermair +1 more | 2022-11-29 |
| 9926746 | Actuating a downhole tool | Rui Gao, Sudarsanam Chellappa, Yaou Wang | 2018-03-27 |
| 8961019 | Flow control through thrust bearing assembly | Parag Konde, Srinivas Likki, Dwayne P. Terracina, Andrew Grebe | 2015-02-24 |
| 8091654 | Rock bit with vectored hydraulic nozzle retention sleeves | Luca Tedeschi, Gary R. Portwood, Riccardo Gronchi | 2012-01-10 |
| 7913778 | Rock bit with hydraulic configuration | Luca Tedeschi, Gary R. Portwood, Riccardo Gronchi | 2011-03-29 |
| 7703354 | Method of forming a nozzle retention body | Dwayne P. Terracina | 2010-04-27 |
| 7694608 | Method of manufacturing a matrix body drill bit | Brian D. Squier, Dwayne P. Terracina, Timothy Scott Roberts | 2010-04-13 |
| 7681670 | Two-cone drill bit | Prabhakaran K. Centala, Mohammed Boudrare | 2010-03-23 |
| 7387178 | Self relieving seal | James L. Neville, Steven W. Peterson, Manikiran Bandi, Alan W. Lockstedt, Peter Thomas Cariveau +3 more | 2008-06-17 |
| 7325632 | Nozzle bore for PDC bits | Dwayne P. Terracina | 2008-02-05 |
| 7252164 | Cutting structure based hydraulics | Syed Hossain, Dwayne P. Terracina, Quan Nguyen | 2007-08-07 |
| 7213661 | Dual property hydraulic configuration | Dwayne P. Terracina, Syed Hossain | 2007-05-08 |
| 7201241 | Self relieving seal | James L. Neville, Steven W. Peterson, Manikiran Bandi, Alan W. Lockstedt, Peter Thomas Cariveau +3 more | 2007-04-10 |
| 7188682 | Multi-stage diffuser nozzle | Godwin Apeh Gabriel, Michael A. Siracki, Dwayne P. Terracina | 2007-03-13 |
| 7040423 | Nozzle bore for high flow rates | Dwayne P. Terracina, Jeffrey D. Leisey | 2006-05-09 |
| 6976548 | Self relieving seal | James L. Neville, Steven W. Peterson, Manikiran Bandi, Alan W. Lockstedt, Peter Thomas Cariveau +3 more | 2005-12-20 |
| 6763902 | Rockbit with attachable device for improved cone cleaning | Dwayne P. Terracina | 2004-07-20 |
| 6585063 | Multi-stage diffuser nozzle | — | 2003-07-01 |
| 6571887 | Directional flow nozzle retention body | Quan Nguyen, Michael A. Siracki, Chris E. Cawthorne | 2003-06-03 |
| 6311793 | Rock bit nozzle and retainer assembly | Michael A. Siracki | 2001-11-06 |
| RE37006 | High flow weld-in nozzle sleeve for rock bits | Michael A. Siracki | 2001-01-02 |
| 5669459 | Nozzle retention system for rock bits | Michael A. Siracki | 1997-09-23 |
| 5538093 | High flow weld-in nozzle sleeve for rock bits | Michael A. Siracki | 1996-07-23 |