Issued Patents All Time
Showing 76–87 of 87 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7703531 | Multifunctional nanoparticles for downhole formation treatments | James B. Crews, John R. Willingham | 2010-04-27 |
| 7696135 | Use of oil-soluble surfactants as breaker enhancers for VES-gelled fluids | James B. Crews | 2010-04-13 |
| 7696134 | Unsaturated fatty acids and mineral oils as internal breakers for VES-gelled fluids | James B. Crews | 2010-04-13 |
| 7615517 | Use of mineral oils to reduce fluid loss for viscoelastic surfactant gelled fluids | James B. Crews | 2009-11-10 |
| 7550413 | Fluid loss control agents for viscoelastic surfactant fluids | James B. Crews, James H. Treadway | 2009-06-23 |
| 7543644 | Concentrated suspension of particulate additives for fracturing and other fluids | James B. Crews, John R. Willingham | 2009-06-09 |
| 7543646 | Suspension of concentrated particulate additives containing oil for fracturing and other fluids | James B. Crews | 2009-06-09 |
| 7544643 | Viscosity enhancers for viscoelastic surfactant stimulation fluids | — | 2009-06-09 |
| 7527102 | Methods and compositions for diverting acid fluids in wellbores | James B. Crews | 2009-05-05 |
| 7527103 | Procedures and compositions for reservoir protection | James B. Crews | 2009-05-05 |
| 6994166 | Composition and method for diversion agents for acid stimulation of subterranean formations | Paul McElfresh | 2006-02-07 |
| 6805198 | Organic acid system for high temperature acidizing | Paul McElfresh, Allen D. Gabrysch | 2004-10-19 |