Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8456952 | Curve-fitting technique for determining dispersion characteristics of guided elastic waves | Xiao Ming Tang, Chen Li | 2013-06-04 |
| 8379483 | Method and apparatus for determining radial shear velocity variation from dipole acoustic logging | Xiao Ming Tang | 2013-02-19 |
| 8261873 | Electromagnetic linear drive source for logging-while-drilling/wireline acoustic applications | Valeriy Richenstev, Vladimir Dubinsky, Jonathan F. Hook, David H. Lilly | 2012-09-11 |
| 8061206 | Casing thickness evaluation method | Alexei Bolshakov, Edward Domangue, Joseph Gregory Barolak | 2011-11-22 |
| 8004932 | Identification of stress in formations using angles of fast and slow dipole waves in borehole acoustic logging | Yibing Zheng, Daniel Moos, Xiao Ming Tang, Vladimir Dubinsky | 2011-08-23 |
| 7970544 | Method and apparatus for characterizing and estimating permeability using LWD Stoneley-wave data | Xiao Ming Tang | 2011-06-28 |
| 7911877 | Active noise cancellation through the use of magnetic coupling | Xiao Ming Tang, Alexei Bolshakov | 2011-03-22 |
| 7773454 | Method and apparatus for cement evaluation using multiple acoustic wave types | Joseph Gregory Barolak, Alexei Bolshakov, Vladimir Dubinsky, Xiao Ming Tang | 2010-08-10 |
| 7681450 | Casing resonant radial flexural modes in cement bond evaluation | Alexei Bolshakov, Vladimir Dubinsky, Xiao Ming Tang, Dimitri Donskoy, Joseph Gregory Barolak | 2010-03-23 |
| 7672784 | Using statistics of a fitting function for data-driven dispersion slowness processing | Yibing Zheng, Xiao Ming Tang | 2010-03-02 |
| 7663969 | Use of Lamb waves in cement bond logging | Xiao Ming Tang, Alexei Bolshakov, Joseph Gregory Barolak, Vladimir Dubinsky, Ron Alers +1 more | 2010-02-16 |
| 7650963 | Acoustic isolator for well logging system | Charles E. Redding, Herbert W. Beimgraben, Charles Hartmann | 2010-01-26 |
| 7646673 | Wave analysis using phase velocity processing | Rais Akhmetsafin, Vladimir Dubinsky | 2010-01-12 |
| 7639562 | Active noise cancellation through the use of magnetic coupling | Xiao Ming Tang, Alexei Bolshakov | 2009-12-29 |
| 7633834 | VSP pattern recognition in absolute time | Holger Mathiszik, Graham A. Gaston | 2009-12-15 |
| 7626886 | P-wave anisotropy determination using borehole measurements | Vladimir Dubinsky, Xiao Ming Tang, Yibing Zheng | 2009-12-01 |
| 7525872 | Method and apparatus for cement bond evaluation using transversely polarized shear waves | Xiao Ming Tang, Alexei Bolshakov, Tsili Wang | 2009-04-28 |
| 7492664 | Method for processing acoustic reflections in array data to image near-borehole geological structure | Xiao Ming Tang, Yibing Zheng | 2009-02-17 |
| 7311143 | Method and apparatus for generation of acoustic shear waves through casing using physical coupling of vibrating magnets | Ole Engels, Joseph Gregory Barolak | 2007-12-25 |
| 7150317 | Use of electromagnetic acoustic transducers in downhole cement evaluation | Joseph Gregory Barolak, Alexei Bolshakov, Vladimir Dubinsky | 2006-12-19 |
| 6985086 | Method and apparatus for LWD shear velocity measurement | Xiao Ming Tang, Tsili Wang, James V. Leggett, III, Vladimir Dubinksy | 2006-01-10 |
| 6930616 | Method and apparatus for LWD shear velocity measurement | Xiao Ming Tang, Tsili Wang, James V. Leggett, III, Vladimir Dubinsky | 2005-08-16 |
| 6909666 | Method and apparatus for generating acoustic signals for LWD shear velocity measurement | Vladimir Dubinsky, James V. Leggett, III, Herbert W. Beimgraben, Julie C. Slaughter, Toby Hansen +1 more | 2005-06-21 |
| 6850168 | Method and apparatus for LWD shear velocity measurement | Xiao Ming Tang, Tsili Wang, James V. Leggett, III, Vladimir Dubinksy | 2005-02-01 |
| 6820716 | Acoustic isolator for well logging system | Charles E. Redding, Herbert W. Beimgraben, Charles Hartmann | 2004-11-23 |