Issued Patents All Time
Showing 101–125 of 147 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7432109 | Spetroscopic pH measurement using optimized mixtures of reagents to extend measurement range | Bhavani Raghuraman, Gale Gustavson, Emilie Dressaire, Oleg Zhdaneev, Ronald Van Hal +1 more | 2008-10-07 |
| 7427504 | Determining fluid chemistry of formation fluid by downhole reagent injection spectral analysis | Torleif Torgersen, Bhavani Raghuraman, Edward Harrigan, Gale Gustavson, Philip Rabbito +1 more | 2008-09-23 |
| 7398159 | System and methods of deriving differential fluid properties of downhole fluids | Lalitha Venkataramanan, Ricardo Vasques | 2008-07-08 |
| 7379819 | Reservoir sample chain-of-custody | Soraya S. Betancourt, Ahmed Hammami, John Nighswander, Syriac George Mathews, Bhavani Raghuraman +3 more | 2008-05-27 |
| 7339160 | Apparatus and method for analysing downhole water chemistry | Bhavani Raghuraman, Anthony Robert Holmes Goodwin, Philip Rabbito, Li Jiang, Timothy Gareth John Jones +2 more | 2008-03-04 |
| 7305306 | System and methods of deriving fluid properties of downhole fluids and uncertainty thereof | Lalitha Venkataramanan, Go Fujisawa, Bhavani Raghuraman, Andrew Carnegie, Ricardo Vasques +4 more | 2007-12-04 |
| 7293715 | Marking system and method | Saad Bargach, Lennox Reid, Soraya S. Betancourt, Christopher S. Del Campo, Ashley C. Kishino | 2007-11-13 |
| 7279678 | Method and apparatus for composition analysis in a logging environment | A. Ballard Andrews, Jacques Jundt, Robert J. Schroeder, Bhavani Raghuraman | 2007-10-09 |
| 7215416 | Method for measuring using optical fiber distributed sensor | Tsutomu Yamate, Robert J. Schroeder, Rogerio Tadeu Ramos | 2007-05-08 |
| 7158887 | Fluids chain-of-custody | Soraya S. Betancourt, Ahmed Hammami, John Nighswander, Peter S. Hegeman, John Ratulowski +4 more | 2007-01-02 |
| 7142306 | Optical probes and probe systems for monitoring fluid flow in a well | Xu Wu, Elizabeth B. Dussan V | 2006-11-28 |
| 7126680 | Method for measuring and calibrating measurements using optical fiber distributed sensor | Tsutomu Yamate, Robert J. Schroeder, Rogerio Tadeu Ramos | 2006-10-24 |
| 7095012 | Methods and apparatus for determining chemical composition of reservoir fluids | Go Fujisawa, Toru Terabayashi, Fredrick A. Jenet, Maria A. Van Agthoven, Philip Rabbito | 2006-08-22 |
| 7095676 | Assessing a solids deposit in an oilfield pipe | Ralph M. D'Angelo, Kenneth W. Winkler, David Johnson, Gale Gustavson | 2006-08-22 |
| 7081615 | Methods and apparatus for the downhole characterization of formation fluids | Soraya S. Betancourt, Anthony Robert Holmes Goodwin, Go Fujisawa, Hani Elshahawi, Julian Pop +2 more | 2006-07-25 |
| 7075063 | Determining phase transition pressure of downhole retrograde condensate | Chengli Dong, Soraya S. Betancourt, Go Fujisawa, James J. Dunlap | 2006-07-11 |
| 7075062 | Apparatus and methods for downhole determination of characteristics of formation fluids | Felix Chen, Gary Corris, Xu Wu, John Barry Fitzgerald, Anthony Robert Holmes Goodwin | 2006-07-11 |
| 7028773 | Assessing downhole WBM-contaminated connate water | Go Fujisawa, Chengli Dong, Andrew Kurkjian | 2006-04-18 |
| 7002142 | Determining dew precipitation and onset pressure in oilfield retrograde condensate | Go Fujisawa, Chengli Dong, Andrew Kurkjian, John Nighswander, Toru Terabayashi +3 more | 2006-02-21 |
| 6995360 | Method and sensor for monitoring gas in a downhole environment | Timothy Gareth John Jones, Boris Matveev, Vladimir Vaynshteyn, Christian Besson, Li Jiang | 2006-02-07 |
| 6992768 | Optical fluid analysis signal refinement | Chengli Dong, Peter S. Hegeman, Kai Hsu, Andrew Kurkjian, Andrew Carnegie | 2006-01-31 |
| 6956204 | Determining fluid properties from fluid analyzer | Chengli Dong, Peter S. Hageman, Go Fujisawa, Soraya S. Betancourt, Julian Pop +3 more | 2005-10-18 |
| 6939717 | Hydrogen sulphide detection method and apparatus | Li Jiang, Timothy Gareth John Jones, Xu Wu | 2005-09-06 |
| 6850317 | Apparatus and methods for determining velocity of oil in a flow stream | Donald C. McKeon, Felix Chen, Xu Wu, Elizabeth B. Dussan V, Henning Groenzin +1 more | 2005-02-01 |
| 6825657 | Magnetic resonance method for characterizing fluid samples withdrawn from subsurface earth formations | Robert L. Kleinberg, David P. Madio | 2004-11-30 |