Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12116844 | Tiling for downhole tool | David C. Hoyle, Scott Dahlgren, David R. Hall | 2024-10-15 |
| 11608719 | Controlling fluid flow through a valve | David R. Hall, Jonathan Marshall, David C. Hoyle, Jordan D. Englund | 2023-03-21 |
| 11220865 | Downhole drilling apparatus with rotatable cutting element | David R. Hall, Jonathan Marshall | 2022-01-11 |
| 11028685 | Downhole rate of penetration measurement | Scott Richard Woolston, Jonathan Marshall, David C. Hoyle | 2021-06-08 |
| 10927647 | Systems and methods for directing fluid flow | David R. Hall, Jonathan Marshall, David C. Hoyle, Jordan D. Englund | 2021-02-23 |
| 6248447 | Cutting elements and methods of manufacture thereof | Nigel Dennis Griffin | 2001-06-19 |
| 6164395 | Cutting structure for rotary drill bits | John M. Fuller, Steven J. Taylor | 2000-12-26 |
| 6151960 | Method of determining characteristics of a rotary drag-type drill bit | Andrew Murdock | 2000-11-28 |
| 6142250 | Rotary drill bit having moveable formation-engaging members | Nigel Dennis Griffin, John M. Fuller, Alex Newton, Andrew Murdock, Steven J. Taylor | 2000-11-07 |
| 6123161 | Rotary drill bits | — | 2000-09-26 |
| 6098726 | Torque transmitting device for rotary drill bits | David Jelley, Andrew Murdock, Brian P. Jarvis | 2000-08-08 |
| 6092613 | Rotary drill bits | Douglas Caraway, John Hayward, Tom Scott Roberts, Steven J. Taylor, Graham Watson | 2000-07-25 |
| 6065554 | Preform cutting elements for rotary drill bits | Nigel Dennis Griffin, Tom Scott Roberts | 2000-05-23 |
| 6062325 | Rotary drill bits | Steven J. Taylor, Dean Watson | 2000-05-16 |
| 5992547 | Rotary drill bits | Douglas Caraway, John Hayward, Tom Scott Roberts, Steven J. Taylor, Graham Watson | 1999-11-30 |
| 5967246 | Rotary drill bits | Douglas Caraway, John Hayward, Tom Scott Roberts, Steven J. Taylor, Graham Watson | 1999-10-19 |
| 5904213 | Rotary drill bits | Douglas Caraway, John Hayward, Tom Scott Roberts, Steven J. Taylor, Graham Watson | 1999-05-18 |
| 5720357 | Cutter assemblies for rotary drill bits | John M. Fuller | 1998-02-24 |
| 5671818 | Rotary drill bits | Alex Newton, Andrew Murdock, John Martin Clegg | 1997-09-30 |
| 5651421 | Rotary drill bits | Alex Newton, John M. Fuller, Andrew Murdock | 1997-07-29 |
| 5222566 | Rotary drill bits and methods of designing such drill bits | Andrew Keohane | 1993-06-29 |
| 5174396 | Cutter assemblies for rotary drill bits | Joseph A. Gasan | 1992-12-29 |
| 5119892 | Notary drill bits | John Martin Clegg, Leslie R. Hawke | 1992-06-09 |
| 4987800 | Cutter elements for rotary drill bits | Joseph A. Gasan, Phillip Bex | 1991-01-29 |
| 4873895 | Manufacture of rotary drill bits | John D. Barr, John R. Smart | 1989-10-17 |