Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8806932 | Cylindrical shaped snorkel interface on evaluation probe | — | 2014-08-19 |
| 8542353 | Refractive index sensor for fluid analysis | Sean M. Christian, Jess V. Ford, Bryan Statt, Thomas J. Blankinship, Christopher T. Cotton +2 more | 2013-09-24 |
| 8436296 | Filter wheel assembly for downhole spectroscopy | Jess V. Ford, Sean M. Christian, Bryan W. Kasperski, Margaret C. Waid | 2013-05-07 |
| 7805999 | Apparatus and methods for measuring pressure using a formation tester | Margaret C. Waid, Bryan W. Kasperski | 2010-10-05 |
| 7805988 | Borehole tester apparatus and methods using dual flow lines | Bryan W. Kasperski, Margaret C. Waid, Stanley R. Thomas | 2010-10-05 |
| 7807962 | Borehole tester apparatus and methods for using nuclear electromagnetic radiation to determine fluid properties | Margaret C. Waid, Bryan W. Kasperski, Richard C. Odom | 2010-10-05 |
| 6752205 | Inflatable packer with prestressed bladder | Andrew Kutac, Paul Andrew Reinhardt, Charles O. Stokley | 2004-06-22 |
| 5644186 | Acoustic Transducer for LWD tool | James R. Birchak, Eugene J. Linyaev, Carl A. Robbins | 1997-07-01 |
| 5606124 | Apparatus and method for determining the gravitational orientation of a well logging instrument | Mark R. Doyle, David M. Chace, John T. Evans, Paul Bergren | 1997-02-25 |
| 5510582 | Acoustic attenuator, well logging apparatus and method of well logging | James R. Birchak, Alexander Lifson, Eugene J. Linyaev, John W. Minear, David J. Young | 1996-04-23 |
| 5331607 | Sweep frequency vibrator | — | 1994-07-19 |
| 5313025 | Displacement amplified acoustic transmitter | A. J. Mallett | 1994-05-17 |
| 5024272 | Drill pipe downhole unthreading apparatus | — | 1991-06-18 |
| 4928764 | Wireline tool cable head overload apparatus | — | 1990-05-29 |