Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5339899 | Drilling fluid removal in primary well cementing | Kris Ravi | 1994-08-23 |
| 5327969 | Method of preventing gas migration during primary well cementing | David L. Sutton | 1994-07-12 |