Issued Patents All Time
Showing 76–100 of 147 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8057752 | Fluid analyzer for determining fluid chemistry of formation fluid by downhole reagent injection spectral analysis | Torleif Torgersen, Bhavani Raghuraman, Edward Harrigan, Gale Gustavson, Philip Rabbito +1 more | 2011-11-15 |
| 8058071 | Downhole spectroscopic hydrogen sulfide detection | Li Jiang, Gale Gustavson, Christopher Harrison, Bhavani Raghuraman, Ronald E. G. van Hal +5 more | 2011-11-15 |
| 8039791 | Downhole fluid spectroscopy | Chengli Dong, Micheal O'Keefe | 2011-10-18 |
| 8032303 | Methods and apparatus to determine a concentration of nitrogen in a downhole fluid | Go Fujisawa, Chee Kin KHONG | 2011-10-04 |
| 7993604 | Spectroscopic pH measurement using optimized mixtures of reagents to extend measurement range | Bhavani Raghuraman, Gale Gustavson, Emilie Dressaire, Oleg Zhdaneev, Ronald Van Hal +1 more | 2011-08-09 |
| 7996154 | Methods and apparatus for analysis of downhole asphaltene gradients and applications thereof | Youxiang Zuo, Jinglin Gao, Abdel M. Kharrat, Kentaro Indo, Michael O'Keefe +3 more | 2011-08-09 |
| 7959864 | Downhole spectroscopic hydrogen sulfide detection | Li Jiang, Gale Gustavson, Christopher Harrison, Bhavani Raghuraman, Ronald E. G. van Hal +5 more | 2011-06-14 |
| 7901555 | Electro-chemical sensor | Li Jiang, Timothy Gareth John Jones, Richard Guy Compton, Nathan Lawrence, Gregory George Wildgoose +2 more | 2011-03-08 |
| 7886825 | Formation fluid sampling tools and methods utilizing chemical heating | Ronald E. G. van Hal, Anthony Robert Holmes Goodwin, Peter S. Hegeman, Bhavani Raghuraman, Soraya S. Betancourt +4 more | 2011-02-15 |
| 7881869 | Method and apparatus for evaluating data associated with an offshore energy platform | Matthew Clayton, Timothy Nguyen | 2011-02-01 |
| 7805979 | High accuracy contamination estimation in hydrocarbon samples using GC×GC | Christopher M. Reddy, Bhavani Raghuraman, Robert Nelson | 2010-10-05 |
| 7788972 | Method of downhole characterization of formation fluids, measurement controller for downhole characterization of formation fluids, and apparatus for downhole characterization of formation fluids | Toru Terabayashi, Tsutomu Yamate, Hideki Kinjo, Akihito Chikenji, Takeaki Nakayama +3 more | 2010-09-07 |
| 7757760 | System and method for real-time management of formation fluid sampling with a guarded probe | John Sherwood | 2010-07-20 |
| 7750302 | Method and apparatus for detecting naphthenic acids | Abul K. M. Jamaluddin, Stephane Vannuffelen | 2010-07-06 |
| 7733490 | Apparatus and methods to analyze downhole fluids using ionized fluid samples | Anthony Robert Holmes Goodwin | 2010-06-08 |
| 7705982 | Methods and apparatus for analyzing fluid properties of emulsions using fluorescence spectroscopy | Jesus Alberto Canas Triana, A. Ballard Andrews, Marc Schneider, Evie Freitas, ChenGang Xian +2 more | 2010-04-27 |
| 7687770 | Methods and apparatus for multi dimension fluorescence spectrum measurement downhole | Kentaro Indo, Albert Ballard Andrews, Stephane Vannuffelen, Tsutomu Yamate, Toru Terabayashi +1 more | 2010-03-30 |
| 7687769 | Methods and apparatus for multi dimension fluorescence spectrum measurement and correlations downhole | Kentaro Indo, Albert Ballard Andrews, Stephane Vannuffelen, Tsutomu Yamate, Toru Terabayashi +1 more | 2010-03-30 |
| 7673679 | Protective barriers for small devices | Christopher Harrison, Olivier Vancauwenberghe, Eric Donzier, Akihito Chikenji, Anthony Robert Holmes Goodwin +1 more | 2010-03-09 |
| 7644611 | Downhole fluid analysis for production logging | Akira Kamiya, Gary Oddie, Stephane Vannuffelen, Tsutomu Yamate, Bhavani Raghuraman +8 more | 2010-01-12 |
| 7542142 | Optical probes and probe systems for monitoring fluid flow in a well | Xu Wu, Elizabeth B. Dussan V | 2009-06-02 |
| 7500388 | Method and apparatus for in-situ side-wall core sample analysis | Go Fujisawa, Peter Wraight, Joel L. Groves, Lennox Reid, Felix Chen +2 more | 2009-03-10 |
| 7461547 | Methods and apparatus of downhole fluid analysis | Toru Terabayashi, Akihito Chikenji, Tsutomu Yamate, Andrew Kurkjian, Hani Elshahawi | 2008-12-09 |
| 7458258 | Methods and apparatus for oil composition determination | ChengGang Xian, Andrew Carnegie, Chengli Dong, Go Fujisawa | 2008-12-02 |
| 7445043 | System and method for detecting pressure disturbances in a formation while performing an operation | Fikri John Kuchuk, Andrew Carnegie | 2008-11-04 |