Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834722 | Cyclic check valve for coiled tubing | Lubos Vacik, John Ravensbergen | 2004-12-28 |
| 6832655 | Method for cleaning gravel packs | John Ravensbergen, Lance Portman | 2004-12-21 |
| 6712150 | Partial coil-in-coil tubing | Richard A. Altman, William Gavin, Alexander R. Crabtree | 2004-03-30 |