Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8093187 | Additive for viscoelastic fluid | Yiyan Chen | 2012-01-10 |
| 7896068 | Activation mechanism applicable for oilfield chemicals products | — | 2011-03-01 |
| 7896964 | Cement retarder | Stephane Boulard | 2011-03-01 |
| 7879770 | Oxidative internal breaker for viscoelastic surfactant fluids | Lijun Lin, Yiyan Chen, Philip F. Sullivan, Belgin Baser, Carlos Abad | 2011-02-01 |
| 7857051 | Internal breaker for oilfield treatments | Carlos Abad, Philip F. Sullivan, Erik Nelson, Yiyan Chen, Belgin Baser +1 more | 2010-12-28 |
| 7810561 | Method and product to consolidate a formation | — | 2010-10-12 |
| 7803744 | Carbon dioxide foamed fluids | Yiyan Chen, Timothy L. Pope | 2010-09-28 |
| 7749944 | Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same | Yiyan Chen, Eric Hanson | 2010-07-06 |
| 7677311 | Internal breaker for oilfield treatments | Carlos Abad, Philip F. Sullivan, Erik Nelson, Yiyan Chen, Belgin Baser +1 more | 2010-03-16 |
| 7632787 | Low damage treatment fluids and methods of using the same | Andrey Mirakyan, Andrew J. Schmidt, Jian Zhou | 2009-12-15 |
| 7507693 | Viscoelastic surfactant fluid systems comprising an aromatic sulfonate and methods of using same | Yiyan Chen, Eric Hanson | 2009-03-24 |
| 7402549 | Viscoelastic surfactant rheology modification | Yiyan Chen, Philip F. Sullivan, Timothy L. Pope | 2008-07-22 |
| 7398826 | Well treatment with dissolvable polymer | Ann M. W. Hoefer, Philip F. Sullivan, Golchehreh Salamat, Curtis L. Boney, Yiyan Chen +5 more | 2008-07-15 |
| 7387987 | Rheology modifiers | Yiyan Chen, Mathew M. Samuel | 2008-06-17 |
| 7378378 | Rheology enhancers | Yiyan Chen, Fang Li, Manilal S. Dahanayake, Robert Tillotson, Allwyn Colaco | 2008-05-27 |
| 7345012 | Foamed viscoelastic surfactants | Yiyan Chen | 2008-03-18 |
| 7343978 | Scale dissolver fluid | Timothy Gareth John Jones, Gary John Tustin, Philip Fletcher | 2008-03-18 |
| 7341980 | Viscoelastic surfactant rheology modification | Yiyan Chen, Timothy L. Pope, Eric Hanson, Samuel Cozzens, Taner Batmaz | 2008-03-11 |
| 7320952 | Additive for viscoelastic fluid | Yiyan Chen | 2008-01-22 |
| 7291651 | Carbon dioxide foamed fluids | Yiyan Chen, Timothy L. Pope | 2007-11-06 |
| 7219731 | Degradable additive for viscoelastic surfactant based fluid systems | Philip F. Sullivan, J Ernest Brown, Golchehreh Salamat | 2007-05-22 |
| 7156177 | Scale dissolver fluid | Timothy Gareth John Jones, Gary John Tustin, Philip Fletcher | 2007-01-02 |
| 7084095 | Methods for controlling the rheological properties of viscoelastic surfactants based fluids | Erik Nelson, Kevin W. England, Philip F. Sullivan | 2006-08-01 |
| 7041187 | Corrugated sandwich panel and method for manufacturing the same | Young-Jun Park, Mo Chung | 2006-05-09 |
| 6908888 | Viscosity reduction of viscoelastic surfactant based fluids | Erik Nelson | 2005-06-21 |