Issued Patents All Time
Showing 101–125 of 135 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7054750 | Method and system to model, measure, recalibrate, and optimize control of the drilling of a borehole | Ronald L. Spross | 2006-05-30 |
| 7017662 | High temperature environment tool system and method | Roger L. Schultz, James Joseph Freeman | 2006-03-28 |
| 6978832 | Downhole sensing with fiber in the formation | Wallace R. Gardner, Neal G. Skinner, Vimal V. Shah | 2005-12-27 |
| 6938458 | Acoustic doppler downhole fluid flow measurement | Wei Han, Jean Michel Beique, James R. Birchak, Alan Hemphill, Tim Wiemers | 2005-09-06 |
| 6909667 | Dual channel downhole telemetry | Vimal V. Shah, Wallace R. Gardner, James H. Dudley, M. Douglas McGregor | 2005-06-21 |
| 6847034 | Downhole sensing with fiber in exterior annulus | Vimal V. Shah, Wallace R. Gardner, Neal G. Skinner | 2005-01-25 |
| 6837332 | Method and apparatus for cancellation of unwanted signals in MWD acoustic tools | — | 2005-01-04 |
| 6829947 | Acoustic Doppler downhole fluid flow measurement | Wei Han, Jean Michel Beique, James R. Birchak, Alan Hemphill, Tim Wiemers | 2004-12-14 |
| 6825659 | Method and apparatus for nuclear magnetic resonance measuring while drilling | Manfred G. Prammer, James H. Dudley, Peter Masak, George David Goodman, Marian Morys +5 more | 2004-11-30 |
| 6791469 | Method of drilling in response to looking ahead of the bit | M. Vikram Rao | 2004-09-14 |
| 6781521 | Filters for canceling multiple noise sources in borehole electromagnetic telemetry system | Wallace R. Gardner, Harrison C. Smith | 2004-08-24 |
| 6781520 | Motion sensor for noise cancellation in borehole electromagnetic telemetry system | Harrison C. Smith, Wallace R. Gardner | 2004-08-24 |
| 6750783 | Low frequency electromagnetic telemetry system employing high cardinality phase shift keying | — | 2004-06-15 |
| 6657597 | Directional signal and noise sensors for borehole electromagnetic telemetry system | Harrison C. Smith, Wallace R. Gardner | 2003-12-02 |
| 6619394 | Method and apparatus for treating a wellbore with vibratory waves to remove particles therefrom | Mohamed Soliman, Ali Mese, Clark E. Robison, James R. Birchak, Wei Han +3 more | 2003-09-16 |
| 6583621 | Method and apparatus for nuclear magnetic resonance measuring while drilling | Manfred G. Prammer, James H. Dudley, Peter Masak, George David Goodman, Marian Morys +5 more | 2003-06-24 |
| 6397950 | Apparatus and method for removing a frangible rupture disc or other frangible device from a wellbore casing | Steven G. Streich, James C. Tucker, James R. Birchak, Neal G. Skinner | 2002-06-04 |
| 6362619 | Method and apparatus for nuclear magnetic resonance measuring while drilling | Manfred G. Prammer, James H. Dudley, Peter Masak, George David Goodman, Marian Morys +5 more | 2002-03-26 |
| 6268726 | Method and apparatus for nuclear magnetic resonance measuring while drilling | Manfred G. Prammer, James H. Dudley, Peter Masak, George David Goodman, Marian Morys +5 more | 2001-07-31 |
| 6196335 | Enhancement of drill bit seismics through selection of events monitored at the drill bit | — | 2001-03-06 |
| 6151554 | Method and apparatus for computing drill bit vibration power spectral density | — | 2000-11-21 |
| 5886303 | Method and apparatus for cancellation of unwanted signals in MWD acoustic tools | — | 1999-03-23 |
| 5806194 | Method for conducting moving or rolling check shot for correcting borehole azimuth surveys | Anne Holmes, Gordon Malcolm Shiells | 1998-09-15 |
| 5720355 | Drill bit instrumentation and method for controlling drilling or core-drilling | Etienne Lamine, Pierre Stassain, Kees Langeveld, Michael S. Bittar | 1998-02-24 |
| 5509490 | EMF sacrificial anode sub and method to deter bit balling | William C. Paske, Ronald D. Ormsby | 1996-04-23 |