Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6881709 | Viscosity reduction of viscoelastic surfactant based fluids | Erik Nelson, Bernhard Lungwitz, Keith Ingram Dismuke, Mathew M. Samuel, Golchi Salamat +6 more | 2005-04-19 |
| 6840318 | Method for treating subterranean formation | Erik Nelson | 2005-01-11 |
| 6599863 | Fracturing process and composition | Bentley J. Palmer | 2003-07-29 |
| 6435277 | Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations | Qi Qu, Erik Nelson, Dean M. Willberg, Mathew M. Samuel, Frank F. Chang +4 more | 2002-08-20 |