Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11293550 | Metal-to-metal sealing system with low component spreading requirements | — | 2022-04-05 |
| 7954510 | Pump valve retainer | — | 2011-06-07 |
| 7681589 | Pump valve retainer | — | 2010-03-23 |
| 6595555 | Coiled tubing swivel with stepped bearing races | Tep Ungchusri | 2003-07-22 |
| 5456322 | Coiled tubing inflatable packer with circulating port | James C. Tucker, Donald W. Winslow, Jeffrey S. Walter | 1995-10-10 |
| 5396953 | Positive circulating valve with retrievable standing valve | Barry Kent Holder, Lawrence J. Leger | 1995-03-14 |
| 5383520 | Coiled tubing inflatable packer with circulating port | James C. Tucker, Donald W. Winslow, Jeffrey S. Walter | 1995-01-24 |
| 5029644 | Jetting tool | David D. Szarka | 1991-07-09 |
| 4991653 | Wash tool | — | 1991-02-12 |
| 4949788 | Well completions using casing valves | David D. Szarka, Bob L. Sullaway, John T. Brandell | 1990-08-21 |