| 8622398 |
Annular seal |
Kendall E. Keene |
2014-01-07 |
$27,325,000 |
| 8235396 |
Annular seal |
Kendall E. Keene |
2012-08-07 |
$42,717,000 |
| 7740248 |
Annular seal |
Kendall E. Keene |
2010-06-22 |
$66,276,000 |
| 7121346 |
Intervention spool for subsea use |
Danny K. Wolff, William M. Taylor, Mark Carter |
2006-10-17 |
$44,255,000 |
| 7070001 |
Expandable sealing apparatus |
Ken Whanger, Christopher Cuffe, Clayton Plucheck, Patrick Maguire |
2006-07-04 |
|
| 6926283 |
Metal-to-metal sealing system |
Dwight D. Janoff, Gregory L. Glidden, Neil Crawford |
2005-08-09 |
$5,725,000 |
| 6907937 |
Expandable sealing apparatus |
Ken Whanger, Christopher Cuffe, Clayton Plucheck, Patrick Maguire |
2005-06-21 |
$22,114,000 |
| 6869080 |
Metal-to-metal sealing system |
Dwight D. Janoff, Gregory L. Glidden, Neil Crawford |
2005-03-22 |
$7,162,000 |
| 6564011 |
Self-regulating heat source for subsea equipment |
Dwight D. Janoff |
2003-05-13 |
$2,927,000 |
| 6561521 |
Metal-to-metal seal with soft metal insert |
Dwight D. Janoff, Gregory L. Glidden, Neil Crawford |
2003-05-13 |
$2,927,000 |
| 6520261 |
Thermal insulation material for subsea equipment |
Dwight D. Janoff |
2003-02-18 |
$5,277,000 |
| 6415868 |
Method and apparatus for preventing the formation of alkane hydrates in subsea equipment |
Dwight D. Janoff |
2002-07-09 |
$3,171,000 |
| 5791657 |
Seals containing composite non-extrusion springs |
David Cain, Andrew C. Posluszny, Rudolf R. Schoen, Jerald L. Smith, Robert Keith Stoddard, Jr. +3 more |
1998-08-11 |
$1,776,000 |
| 5762089 |
Hardface coating for seal surfaces in a gate valve |
Sue F. Haeberle, Christi Hambrick, Jack Havens, Manuel N. Maligas, Brian Swagerty |
1998-06-09 |
$2,737,000 |
| 5740863 |
Subsea wellhead mechanical erosion detector |
Charles R. Ortloff, Thomas Dorsch, Lee A. Gillette, Michael R. Williams |
1998-04-21 |
$5,879,000 |
| 5180008 |
Wellhead seal for wide temperature and pressure ranges |
Tod Aldridge, John A. Fitzgerald, Allan K. McGregor, Ronald D. Quates, Rudolf R. Schoen +1 more |
1993-01-19 |
$3,145,000 |
| 5031695 |
Well casing hanger with wide temperature range seal |
David Cain, Ronald W. Henley, Kevin P. Long, Tep Ungchusri |
1991-07-16 |
$11,910,000 |
| 4848777 |
Pressure energized/pressure intensified casing seal |
David Zollo, Roy W. Benefield, David Cain, Phillip F. Huang, Brenda K. Montemayor +3 more |
1989-07-18 |
$7,851,000 |
| 4567211 |
Naphthalenic derivatized plasticizers for polyphosphazene polymers |
Arthur E. Oberster |
1986-01-28 |
$4,504,000 |
| 4553730 |
Ram-type blowout preventer and packer therefor |
— |
1985-11-19 |
|
| 4518144 |
Ram-type blowout preventer and packer therefor |
Carl A. La Velle, Joe P. Parris |
1985-05-21 |
$3,335,000 |