| 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 |