Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10605032 | Electrically insulated tubing hanger system | Ana Karoline Ayres | 2020-03-31 |
| 9103183 | Method and apparatus for launching multiple balls in a well | Henry He, Gene Ambrose | 2015-08-11 |
| 8919453 | Scalloped landing ring | Henry He, Gene Ambrose | 2014-12-30 |
| 8141641 | Backup safety flow control system for concentric drill string | Henry He | 2012-03-27 |
| 7823634 | Wellhead isolation sleeve assembly | Henry He, Eugene Borak | 2010-11-02 |
| 7647989 | Backup safety flow control system for concentric drill string | Henry He | 2010-01-19 |
| 7090033 | Drill string shutoff valve | Behrooz Movaffagh, Xiaoping He | 2006-08-15 |
| 7069995 | Remedial system to flush contaminants from tubing string | David J. Sedgwick, David Daniel Comeaux, John M. Murphy | 2006-07-04 |
| 7017682 | Drill string shutoff valve | Behrooz Movaffagh, Xiaoping He, Loren P. Boisvert | 2006-03-28 |
| 6918452 | Drill string shutoff valve | Behrooz Movaffagh, Loren P. Boisvert | 2005-07-19 |
| 6736208 | Wellhead production pumping tree with access port | Daniel J. Riddell | 2004-05-18 |