Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6909666 | Method and apparatus for generating acoustic signals for LWD shear velocity measurement | James V. Leggett, III, Douglas J. Patterson, Herbert W. Beimgraben, Julie C. Slaughter, Toby Hansen +1 more | 2005-06-21 |
| 6891481 | Resonant acoustic transmitter apparatus and method for signal transmission | Volker Krueger | 2005-05-10 |
| 6769497 | Use of axial accelerometer for estimation of instantaneous ROP downhole for LWD and wireline applications | Pushkar N. Jogi, James V. Leggett, III, Douglas J. Patterson, Alexei Bolshakov, Volker Krueger | 2004-08-03 |
| 6757218 | Semi-passive two way borehole communication apparatus and method | — | 2004-06-29 |
| 6732052 | Method and apparatus for prediction control in drilling dynamics using neural networks | Robert MacDonald, Volker Krueger, John D. Macpherson, Dmitriy Dashevskiy | 2004-05-04 |
| 6697298 | High efficiency acoustic transmitting system and method | David M. Schneider, Terry A. Seyler | 2004-02-24 |
| 6615949 | Acoustic isolator for downhole applications | Sergey Egerev, Vladimir Belov, Alexei Bolshakov, Victor Tiutekin, Victor Yushin | 2003-09-09 |
| 6614360 | Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers | James V. Leggett, III, Douglas J. Patterson | 2003-09-02 |
| 6581010 | Semblance processing for an acoustic measurement-while-drilling system for imaging of formation boundaries | James V. Leggett, III, Alexi Bolshakov | 2003-06-17 |
| 6470275 | Adaptive filtering with reference accelerometer for cancellation of tool-mode signal in MWD applications | — | 2002-10-22 |
| 6427124 | Semblance processing for an acoustic measurement-while-drilling system for imaging of formation boundaries | James V. Leggett, III, Alexi Bolshakov | 2002-07-30 |
| 6088294 | Drilling system with an acoustic measurement-while-driving system for determining parameters of interest and controlling the drilling direction | James V. Leggett, III, John W. Harrell, William Thomas Balogh, Paul Seaton, Andrew Brooks +1 more | 2000-07-11 |
| 6082484 | Acoustic body wave dampener | Eric Molz, James E. Leggett, III | 2000-07-04 |
| 6078868 | Reference signal encoding for seismic while drilling measurement | — | 2000-06-20 |
| 6023443 | Semblance processing for an acoustic measurement-while-drilling system for imaging of formation boundaries | Alexei Bolshakov, James V. Leggett, III | 2000-02-08 |
| 6021377 | Drilling system utilizing downhole dysfunctions for determining corrective actions and simulating drilling conditions | James V. Leggett, III | 2000-02-01 |
| 5842149 | Closed loop drilling system | John W. Harrell, James V. Leggett, III | 1998-11-24 |