Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5361631 | Apparatus and methods for determining the shear stress required for removing drilling fluid deposits | Rick L. Covington, Shawn Heath, Bryan Waugh | 1994-11-08 |
| 5339899 | Drilling fluid removal in primary well cementing | Fred Sabins | 1994-08-23 |
| 5309761 | Methods and apparatus for measuring the erodability of drilling fluid deposits | Robert M. Beirute | 1994-05-10 |