| 6514916 |
Process for making sulfonated uintaite and well fluid additives including sulfonated uintaite |
Richard L. Clampitt |
2003-02-04 |
| 5380705 |
Drilling mud comprising tetrapolymer consisting of n-vinyl-2-pyrrolidone, acrylamidopropanesulfonicacid, acrylamide, and acrylic acid |
Michael Stephens, Bharat B. Patel |
1995-01-10 |
| 5135909 |
Drilling mud comprising tetrapolymer consisting of N-vinyl-2-pyrrolidone, acrylamidopropanesulfonic acid, acrylamide, and acrylic acid |
Michael Stephens |
1992-08-04 |
| 4997582 |
Compositions for acid treating subterranean formations |
Earl Clark, Jr. |
1991-03-05 |
| 4775010 |
Methods and compositions for acid treating subterranean formations |
Earl Clark, Jr. |
1988-10-04 |
| 4752404 |
Blends of water soluble polymers |
Lyle D. Burns |
1988-06-21 |
| 4743383 |
Drilling fluid additives for use in hard brine environments |
Wayne S. Stewart, George G. Dixon, John M. Elsen |
1988-05-10 |
| 4455241 |
Wellbore fluid |
— |
1984-06-19 |
| 4440228 |
Gelled compositions and well treating |
— |
1984-04-03 |
| 4425241 |
Drilling fluids |
— |
1984-01-10 |
| 4323123 |
Gelled compositions and well treating |
— |
1982-04-06 |
| 4293036 |
Shear-thickening compositions |
— |
1981-10-06 |
| 4289203 |
Oil displacement method using shear-thickening compositions |
— |
1981-09-15 |
| 4246124 |
Gelled compositions and well treating |
— |
1981-01-20 |
| 4244826 |
Gelled acidic well treating composition and process |
— |
1981-01-13 |
| 4240505 |
Well acidizing compositions and methods |
— |
1980-12-23 |
| 4212747 |
Shear-thickening compositions |
— |
1980-07-15 |
| 4205724 |
Well treating compositions |
Louis E. Roper |
1980-06-03 |
| 4191657 |
Compositions for acidizing subterranean formations |
— |
1980-03-04 |