| 8656942 |
Length-adjustable pressure-retaining piping components |
Pablo Garce, Sandra Lipezker, Yue Gong |
2014-02-25 |
| 7823643 |
Insulation shroud with internal support structure |
Michael Mann |
2010-11-02 |
| 6557629 |
Wellhead isolation tool |
Roy W. Benefield, George E. Guthrie, Christopher P. Egan |
2003-05-06 |
| 6374914 |
Duel completion bop centralizer |
Gregory L. Glidden, Richard T. Schmidt |
2002-04-23 |
| 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, Bashir M. Koleilat, David Cain, John Robert Herold, Neil Crawford |
1998-07-21 |
| 5775422 |
Tree test plug |
David Cain, Jeffrey L. Mathews |
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 |
| 5342066 |
Non-extrusion device for split annular casing/tubing hanger compression seals |
Ronald W. Henley, Ronald D. Quates, Michael R. Williams |
1994-08-30 |
| 5183268 |
Metal-to-metal wellhead seal for rough casing |
Ronald D. Quates, Lien-Yan Chen |
1993-02-02 |
| 5088390 |
Automatic food cooking device |
Peng Zhou |
1992-02-18 |
| 4914854 |
Insect trap |
Peng Zhou |
1990-04-10 |
| 4821631 |
Cooking food device |
Pen Weichou |
1989-04-18 |
| 4193234 |
Stabilizing of structures |
— |
1980-03-18 |