Issued Patents All Time
Showing 51–75 of 76 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7448262 | Determination of correct horizontal and vertical permeabilities in a deviated well | James J. Sheng | 2008-11-11 |
| 7448263 | Practical methods to estimate horizontal and vertical permeabilities | James J. Sheng | 2008-11-11 |
| 7363161 | Pore-scale geometric models for interpretation of downhole formation evaluation data | Mikhail Gladkikh, Songhua Chen | 2008-04-22 |
| 7356413 | Pore-scale geometric models for interpretation of downhole formation evaluation data | Songhua Chen, David Jacobi | 2008-04-08 |
| 7317991 | Multicomponent induction measurements in cross-bedded and weak anisotropy approximation | Tsili Wang | 2008-01-08 |
| 7257490 | Pore-scale geometric models for interpretation of downhole formation evaluation data | Songhua Chen, David Jacobi | 2007-08-14 |
| 7231818 | Determining horizontal and vertical permeabilities by analyzing two pretests in a horizontal well | James J. Sheng | 2007-06-19 |
| 7227355 | Method of detecting, quantifying and correcting borehole contaminations from multi-frequency, multi-sensitive-volume NMR logging data | Songhua Chen, Gigi Zhang | 2007-06-05 |
| 7181960 | Determination of correct horizontal and vertical permeabilities in a deviated well | James J. Sheng | 2007-02-27 |
| 7157915 | Combined characterization and inversion of reservoir parameters from nuclear, NMR and resistivity measurements | Juergen Schoen, Otto N. Fanini | 2007-01-02 |
| 7126333 | Method and apparatus for correcting ringing in NMR signals | David R. Beard | 2006-10-24 |
| 7116103 | Nuclear magnetic resonance method and apparatus for evaluating a characteristic of a region | Carl M. Edwards | 2006-10-03 |
| 7012426 | High-resolution high-speed NMR well logging device | Carl M. Edwards | 2006-03-14 |
| 6755246 | In-situ heavy-oil reservoir evaluation with artificial temperature elevation | Songhua Chen | 2004-06-29 |
| 6720765 | High-resolution high-speed NMR well logging device | Carl M. Edwards | 2004-04-13 |
| 6686736 | Combined characterization and inversion of reservoir parameters from nuclear, NMR and resistivity measurements | Juergen Schoen, Otto N. Fanini | 2004-02-03 |
| 6601461 | Multi-phase compensated spinner flow meter | Jorge O. Maxit, David M. Chace, Jianrong Wang | 2003-08-05 |
| 6084408 | Methods for acquisition and processing of nuclear magnetic resonance signals for determining fluid properties in petroleum reservoirs having more than one fluid phase | Songhua Chen | 2000-07-04 |
| 6069477 | Method for improving the accuracy of NMR relaxation distribution analysis with two echo trains | Songhua Chen | 2000-05-30 |
| 5770798 | Variable diameter probe for detecting formation damage | John M. Michaels, Michael J. Moody | 1998-06-23 |
| 5610331 | Thermal imager for fluids in a wellbore | — | 1997-03-11 |
| 5571962 | Method and apparatus for analyzing drill cuttings | Homer A. Robertson, Mark S. Franks | 1996-11-05 |
| 5561245 | Method for determining flow regime in multiphase fluid flow in a wellbore | Shanhong Song, Jian Zhang | 1996-10-01 |
| 5553034 | Differential pressure fluid density instrument | Stanley C. Jones | 1996-09-03 |
| 5509303 | Controllable sensitivity differential pressure fluid density instrument | — | 1996-04-23 |