Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9690000 | System for measuring shear stress in downhole tubulars | — | 2017-06-27 |
| 8553494 | System for measuring stress in downhole tubulars | — | 2013-10-08 |
| 8522611 | Method and apparatus for measuring pore pressure beyond the casing | Leonid L. Frumin | 2013-09-03 |
| RE43960 | System for measuring stress in downhole tubulars | — | 2013-02-05 |
| 8127846 | Wiper plug perforating system | Freeman L. Hill, Randy L. Evans, John H. Clark, Mark L. Sloan, William D. Myers +1 more | 2012-03-06 |
| 8061206 | Casing thickness evaluation method | Alexei Bolshakov, Edward Domangue, Douglas J. Patterson | 2011-11-22 |
| 7795864 | Apparatus and method of using multi-component measurements for casing evaluation | Douglas W. Spencer, Jerry Miller, Bruce I. Girrell, Jason Lynch, Chris J. Walter | 2010-09-14 |
| 7773454 | Method and apparatus for cement evaluation using multiple acoustic wave types | Douglas J. Patterson, Alexei Bolshakov, Vladimir Dubinsky, Xiao Ming Tang | 2010-08-10 |
| 7757769 | Wellbore and reservoir treatment device and method | Freeman L. Hill, Gary J. Cresswell, Randy L. Evans | 2010-07-20 |
| 7697375 | Combined electro-magnetic acoustic transducer | Arcady Reiderman | 2010-04-13 |
| 7681450 | Casing resonant radial flexural modes in cement bond evaluation | Alexei Bolshakov, Vladimir Dubinsky, Xiao Ming Tang, Douglas J. Patterson, Dimitri Donskoy | 2010-03-23 |
| 7663969 | Use of Lamb waves in cement bond logging | Xiao Ming Tang, Alexei Bolshakov, Douglas J. Patterson, Vladimir Dubinsky, Ron Alers +1 more | 2010-02-16 |
| 7660197 | System for measuring stress in downhole tubulars | — | 2010-02-09 |
| 7595636 | Apparatus and method of using accelerometer measurements for casing evaluation | Douglas W. Spencer, Jerry Miller, Bruce I. Girrell, Jason Lynch, Chris J. Walter | 2009-09-29 |
| 7403000 | Apparatus and method of determining casing thickness and permeability | Douglas W. Spencer, Jerry Miller, Bruce I. Girrell, Jason Lynch, Chris J. Walter | 2008-07-22 |
| 7372018 | Determination of gas pressure and saturation simultaneously | Darryl E. Trcka, Pingjun Guo, Steve Riley, David M. Chace | 2008-05-13 |
| 7311143 | Method and apparatus for generation of acoustic shear waves through casing using physical coupling of vibrating magnets | Ole Engels, Douglas J. Patterson | 2007-12-25 |
| 7150317 | Use of electromagnetic acoustic transducers in downhole cement evaluation | Alexei Bolshakov, Vladimir Dubinsky, Douglas J. Patterson | 2006-12-19 |