Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6580751 | High speed downhole communications network having point to multi-point orthogonal frequency division multiplexing | Wallace R. Gardner | 2003-06-17 |
| 6400646 | Method for compensating for remote clock offset | Vimal V. Shah, Robert L. Malloy, James R. Birchak, Wallace R. Gardner, Carl A. Robbins | 2002-06-04 |
| 6378357 | Method of fluid rheology characterization and apparatus therefor | Wei Han, Ronnie Glen Morgan, James R. Birchak | 2002-04-30 |
| 6370082 | Acoustic telemetry system with drilling noise cancellation | Wallace R. Gardner, Vimal V. Shah | 2002-04-09 |
| 6355928 | Fiber optic tomographic imaging of borehole fluids | Neal G. Skinner, Gerald Gardner, Margaret C. Waid, Wallace R. Gardner | 2002-03-12 |
| 6172614 | Method and apparatus for remote actuation of a downhole device using a resonant chamber | Clark E. Robison, Wallace R. Gardner | 2001-01-09 |
| 6137747 | Single point contact acoustic transmitter | Vimal V. Shah, James R. Birchak, Wallace R. Gardner, Donald G. Kyle, John Dennis +3 more | 2000-10-24 |
| 6131694 | Vertical seismic profiling in a drilling tool | Carl A. Robbins, Eugene J. Linyaev, Robert L. Malloy, David J. Young, James R. Birchak +1 more | 2000-10-17 |
| 6131658 | Method for permanent emplacement of sensors inside casing | — | 2000-10-17 |
| 6125079 | System and method for providing dual distance transducers to image behind an acoustically reflective layer | James R. Birchak, Batakrishna Mandal, James Masino, Thomas Ritter | 2000-09-26 |
| 6102152 | Dipole/monopole acoustic transmitter, methods for making and using same in down hole tools | James Masino, Batakrishna Mandal, James R. Birchak, Thomas Ritter | 2000-08-15 |
| 6026913 | Acoustic method of connecting boreholes for multi-lateral completion | Batakrishna Mandal, James R. Birchak | 2000-02-22 |
| 6021093 | Transducer configuration having a multiple viewing position feature | James R. Birchak, Batakrishna Mandal, James Masino, Thomas Ritter | 2000-02-01 |
| 6002639 | Sensor configuration for nulling reverberations to image behind reflective layers | James R. Birchak, Batakrishna Mandal, James Masino, Thomas Ritter | 1999-12-14 |
| 5995447 | System and method for processing acoustic signals to image behind reflective layers | Batakrishna Mandal, James R. Birchak, James Masino, Thomas Ritter | 1999-11-30 |
| 5841734 | Rotating acoustic transducer head for cement bond evaluation tool | Thomas Ritter, James R. Birchak, James W. Stroud, Mack H. Brown, James Masino | 1998-11-24 |
| 5763773 | Rotating multi-parameter bond tool | James R. Birchak, James W. Stroud, Batakrishna Mandal | 1998-06-09 |
| 5726951 | Standoff compensation for acoustic logging while drilling systems | James R. Birchak, Eugene J. Linyaev, Carl A. Robbins, Bruce Mackie | 1998-03-10 |
| 5678643 | Acoustic logging while drilling tool to determine bed boundaries | Carl A. Robbins, A. J. Mallett, Batakrishna Mandal, James R. Birchak, Eugene J. Linyaev | 1997-10-21 |
| 5510582 | Acoustic attenuator, well logging apparatus and method of well logging | James R. Birchak, Alexander Lifson, Eugene J. Linyaev, Dennis Roessler, David J. Young | 1996-04-23 |
| 5124952 | Formation fracture detection using instantaneous characteristics of sonic waveforms | Stanislav Knize | 1992-06-23 |
| 4947683 | Pulsed ultrasonic doppler borehole fluid measuring apparatus | Randy Gold | 1990-08-14 |
| 4869349 | Flexcompressional acoustic transducer | David Rathmann | 1989-09-26 |
| 4700803 | Transducer forming compression and shear waves for use in acoustic well logging | A. J. Mallett | 1987-10-20 |
| 4673033 | Tubing conveyed perforating assembly safety device | Raymond McNiece | 1987-06-16 |