Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671810 | Composition and method for relief of differential sticking during drilling | William S. Halliday, Thomas Daves, Thomas F. Carter | 1997-09-30 |
| 5633220 | High internal phase ratio water-in-oil emulsion fracturing fluid | Kay E. Cawiezel | 1997-05-27 |
| 5591699 | Particle transport fluids thickened with acetylate free xanthan heteropolysaccharide biopolymer plus guar gum | — | 1997-01-07 |