Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10295692 | Fracture detection and localization using acoustic reflections | Dustin Cavin, Ralph M. D'Angelo, Kenneth W. Winkler | 2019-05-21 |
| 10066474 | Vibration detection in a drill string based on multi-positioned sensors | Paul F. Rodney, Chenkang David Chen | 2018-09-04 |
| 10060248 | Vibration detection in a drill string based on multi-positioned sensors | Paul F. Rodney, Chenkang David Chen | 2018-08-28 |
| 9477008 | Method and system of transmitting acoustic signals from a wellbore | Li Gao | 2016-10-25 |
| 9022145 | Vibration detection in a drill string based on multi-positioned sensors | Paul F. Rodney, Chenkang David Chen | 2015-05-05 |
| 8749400 | Symbol synchronization for downhole OFDM telemetry | — | 2014-06-10 |
| 8634273 | Acoustic telemetry system using passband equalization | Wallace R. Gardner, Vimal V. Shah | 2014-01-21 |
| 8193946 | Training for directional detection | Sinan Sinanovic, Donald H. Johnson, Wallace R. Gardner, Li Gao | 2012-06-05 |
| 7339852 | Seismic acquisition system | Darrell Gordy, Bruce Cornish, Denis P. Schmitt | 2008-03-04 |
| 7212075 | Downhole clock having temperature compensation | David J. Young, Eugene J. Linyaev | 2007-05-01 |
| 6478107 | Axially extended downhole seismic source | James R. Birchak, Robert L. Malloy, Eugene J. Linyaev, David J. Young | 2002-11-12 |
| 6400646 | Method for compensating for remote clock offset | Vimal V. Shah, John W. Minear, Robert L. Malloy, James R. Birchak, Wallace R. Gardner | 2002-06-04 |
| 6374913 | Sensor array suitable for long term placement inside wellbore casing | Bill Schaecher, Patrick Dennis Chesnutt | 2002-04-23 |
| 6131694 | Vertical seismic profiling in a drilling tool | Eugene J. Linyaev, Robert L. Malloy, David J. Young, James R. Birchak, John W. Minear +1 more | 2000-10-17 |
| 5780784 | Cancellation of tool mode signal from combined signal | — | 1998-07-14 |
| 5726951 | Standoff compensation for acoustic logging while drilling systems | James R. Birchak, Eugene J. Linyaev, John W. Minear, Bruce Mackie | 1998-03-10 |
| 5678643 | Acoustic logging while drilling tool to determine bed boundaries | A. J. Mallett, John W. Minear, Batakrishna Mandal, James R. Birchak, Eugene J. Linyaev | 1997-10-21 |
| 5644186 | Acoustic Transducer for LWD tool | James R. Birchak, Eugene J. Linyaev, Dennis Roessler | 1997-07-01 |
| 4481597 | Borehole spectral analog to digital converter | — | 1984-11-06 |
| 4459479 | Determination of casing thickness using a natural gamma ray spectroscopy technique | Harry D. Smith, Jr., Dan M. Arnold | 1984-07-10 |
| 4450354 | Gain stabilized natural gamma ray detection of casing thickness in a borehole | Harry D. Smith, Jr. | 1984-05-22 |
| 4300043 | Stabilized radioactive logging method and apparatus | — | 1981-11-10 |