Issued Patents All Time
Showing 126–147 of 147 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6768105 | Methods and apparatus for downhole fluids analysis | Toru Terabayashi, Kazuyoshi Kegasawa, Ikko Okuda | 2004-07-27 |
| 6729400 | Method for validating a downhole connate water sample | Michael Hayward Hodder, Cosan Ayan, Yifu Zhu, Phillip Rabbito | 2004-05-04 |
| 6704109 | Downhole fluorescence detection apparatus | Xu Wu, Marian Faur, Fabien Cens, Jacques Sellin, Felix Chen | 2004-03-09 |
| 6501072 | Methods and apparatus for determining precipitation onset pressure of asphaltenes | Abul K. M. Jamaluddin, Nikhil B. Joshi | 2002-12-31 |
| 6476384 | Methods and apparatus for downhole fluids analysis | Toru Terabayashi, Kazuyoshi Kegasawa, Ikko Okuda | 2002-11-05 |
| 6474152 | Methods and apparatus for optically measuring fluid compressibility downhole | Andrew Kurkjian, Robin McGowan, Thomas L. DiStefano, III, Ian Traboulay | 2002-11-05 |
| 6465775 | Method of detecting carbon dioxide in a downhole environment | Philip Rabbito, Lawrence E. McGowan, Toru Terabayashi, Kazuyoshi Kegasawa | 2002-10-15 |
| 6437326 | Permanent optical sensor downhole fluid analysis systems | Tsutomu Yamate | 2002-08-20 |
| 6350986 | Analysis of downhole OBM-contaminated formation fluid | Jon J. Shroer | 2002-02-26 |
| 6274865 | Analysis of downhole OBM-contaminated formation fluid | Jon J. Schroer | 2001-08-14 |
| 6268603 | Method and apparatus for interpreting fluorescence logging data | Xu Wu, Charles Flaum | 2001-07-31 |
| 6140637 | Method and apparatus for fluorescence logging | Xu Wu, Philip Rabbito | 2000-10-31 |
| 6075611 | Methods and apparatus utilizing a derivative of a fluorescene signal for measuring the characteristics of a multiphase fluid flow in a hydrocarbon well | Elizabeth B. Dussan V., Xu Wu, Richard Gaylor, Rogerio Tadeu Ramos, Kenneth E. Stephenson | 2000-06-13 |
| 6023340 | Single point optical probe for measuring three-phase characteristics of fluid flow in a hydrocarbon well | Xu Wu, Edmund J. Fordham, Rogerio Tadeu Ramos | 2000-02-08 |
| 5939717 | Methods and apparatus for determining gas-oil ratio in a geological formation through the use of spectroscopy | — | 1999-08-17 |
| 5912459 | Method and apparatus for fluorescence logging | Xu Wu, Philip Rabbito | 1999-06-15 |
| 5859430 | Method and apparatus for the downhole compositional analysis of formation gases | Xu Wu | 1999-01-12 |
| 5517024 | Logging-while-drilling optical apparatus | Xu Wu | 1996-05-14 |
| 5331156 | Method of analyzing oil and water fractions in a flow stream | Daniel R. Hines, Noboru Wada, Stephen Garoff, Paul Hammond, Jeffrey A. Tarvin +2 more | 1994-07-19 |
| 5266800 | Method of distinguishing between crude oils | — | 1993-11-30 |
| 5201220 | Apparatus and method for detecting the presence of gas in a borehole flow stream | Daniel R. Hines, Masaru Niwa, Kambiz A. Safinya | 1993-04-13 |
| 5167149 | Apparatus and method for detecting the presence of gas in a borehole flow stream | Daniel R. Hines, Masaru Niwa, Kambiz A. Safinya | 1992-12-01 |