Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8196649 | Thru diverter wellhead with direct connecting downhole control | Robert S. Allen, David Cain | 2012-06-12 |
| 8157006 | Telescopic fracturing isolation sleeve | Sean Gresham, David Cain | 2012-04-17 |
| 6615915 | High pressure side-by-side wellhead system | — | 2003-09-09 |
| 6510895 | Energized sealing cartridge for annulus sealing between tubular well components | David Cain, Qiu Zheng, Michael H. Hunt | 2003-01-28 |
| 5996695 | Method and apparatus for sealing between casing and wellhead connector structure | David Cain | 1999-12-07 |
| 5896925 | Tool protection guide | Gerald Brian Swagerty, David Cain, John Robert Herold, Don B. Wafer, Randy Elum +1 more | 1999-04-27 |
| 5782297 | Retrieval tool for back pressure valve and tree test plug | Martin L. Samuels, David Cain, John Robert Herold, Neil Crawford, Henry Wong | 1998-07-21 |
| 5775427 | Internally latched subsea wellhead tieback connector | Harold Brian Skeels, Shiva P. Singeetham | 1998-07-07 |
| 5730218 | Tool protection guide with energy absorbing bumper | Gerald Brian Swagerty, David Cain, John Robert Herold, Don B. Wafer, Randy Elum +1 more | 1998-03-24 |
| 5474124 | Wellhead retrieval tool assembly | Martin L. Samuels, David Cain, John Robert Herold, Neil Crawford | 1995-12-12 |
| 5109923 | Wellhead bowl protector | — | 1992-05-05 |
| 4568062 | Fire-resistant gate valve | Alfred P. Regitz, Stephen P. Barrett, Charles E. Jennings, Kendall E. Keene, John N. McIntyre +2 more | 1986-02-04 |
| 4471965 | High-pressure fire-resistant metal seal | Charles E. Jennings, Thomas N. Treue | 1984-09-18 |