Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7487832 | Force transfer apparatus to assist release of loaded member | — | 2009-02-10 |
| 7438130 | Downhole actuating apparatus and method | — | 2008-10-21 |
| 7404446 | Well tool protection system and method | Michael Hui Du | 2008-07-29 |
| 7231986 | Well tool protection system and method | Michael Hui Du | 2007-06-19 |
| 7216713 | Downhole actuating apparatus and method | — | 2007-05-15 |
| 6978842 | Volume compensated shifting tool | Clay W. Milligan, Jr. | 2005-12-27 |
| 6772842 | Curved flapper valve | Alfred Lara Hernandez, Juan A. Campos | 2004-08-10 |
| 6715557 | Tool string | Rodney J. Wetzel, Stephen Meschall, Clay W. Milligan, Jr. | 2004-04-06 |
| 6631768 | Expandable shifting tool | Dinesh R. Patel, Ricardo L. Martinez | 2003-10-14 |
| 6433991 | Controlling activation of devices | Thomas M. Deaton, Dwayne Leismer | 2002-08-13 |
| 6328109 | Downhole valve | Ronald E. Pringle, Clay W. Milligan, Jr. | 2001-12-11 |
| 6257792 | Retaining ring | — | 2001-07-10 |
| 6213202 | Separable connector for coil tubing deployed systems | — | 2001-04-10 |
| 6142237 | Method for coupling and release of submergible equipment | David A. G. Christmas, David Christopher Turner | 2000-11-07 |
| 6003834 | Fluid circulation apparatus | — | 1999-12-21 |
| 5984006 | Emergency release tool | Dwayne Leismer | 1999-11-16 |