Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10428584 | Bit for drilling with casing or liner string and manufacture thereof | Bruno Cuillier De Maindreville, Gilles Gallego | 2019-10-01 |
| 9708858 | Methods to repair worn or eroded PDC cutters, cutters so repaired, and use of repaired PDC cutters in drill bits or other tools | William W. King, Federico Bellin, Marvin Windsor Amundsen, Charles Daniel Johnson | 2017-07-18 |
| 9488012 | Streamlined pocket design for PDC drill bits | — | 2016-11-08 |
| 9469914 | Ultrasound assisted electrochemical catalyst removal for superhard materials | Federico Bellin, Michael R. Reese | 2016-10-18 |
| 9359824 | Method for reducing intermetallic compounds in matrix bit bondline | Federico Bellin, Marvin Windsor Amundsen, Olivier Ther, Alfazazi Dourfaye, Bruno Cuillier De Maindreville +1 more | 2016-06-07 |
| 9086348 | Downhole acoustic emission formation sampling | Federico Bellin, Alfazazi Dourfaye, William W. King | 2015-07-21 |
| 8434347 | Synthetic materials for PDC cutter testing or for testing other superhard materials | Michael R. Reese, Federico Bellin, Alfazazi Dourfaye | 2013-05-07 |
| 8434348 | Synthetic materials for PDC cutter testing or for testing other superhard materials | Michael R. Reese, Federico Bellin, Alfazazi Dourfaye | 2013-05-07 |
| 8434346 | Synthetic materials for PDC cutter testing or for testing other superhard materials | Michael R. Reese, Federico Bellin, Alfazazi Dourfaye | 2013-05-07 |
| 6926099 | Drill out bi-center bit and method for using same | Carl W. Keith | 2005-08-09 |
| 6904983 | Low-contact area cutting element | Carl W. Keith, Bruno Cuillier | 2005-06-14 |
| 6568492 | Drag-type casing mill/drill bit | Carl W. Keith | 2003-05-27 |
| 6142248 | Reduced erosion nozzle system and method for the use of drill bits to reduce erosion | Henry P. Rebollido, Jr., Coy M. Fielder, Brad Weston | 2000-11-07 |
| 6068072 | Cutting element | Alain Besson, Coy M. Fielder | 2000-05-30 |
| 6026919 | Cutting element with stress reduction | Coy M. Fielder, Brad Weston | 2000-02-22 |
| 5558170 | Method and apparatus for improving drill bit stability | William H. Sherwood, Jr., Coy M. Fielder | 1996-09-24 |
| 5449048 | Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface | William H. Sherwood, Jr., Coy M. Fielder | 1995-09-12 |
| 5333699 | Drill bit having polycrystalline diamond compact cutter with spherical first end opposite cutting end | William H. Sherwood, Jr. | 1994-08-02 |