Issued Patents All Time
Showing 126–144 of 144 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7138803 | Electromagnetic wave resistivity tool having a tilted antenna for geosteering within a desired payzone | — | 2006-11-21 |
| 7098664 | Multi-mode oil base mud imager | Guoyu Hu, James Buchanan | 2006-08-29 |
| 7098858 | Ruggedized multi-layer printed circuit board based downhole antenna | Jesse Kevin Hensarling | 2006-08-29 |
| 7046010 | Multi-mode microresistivity tool in boreholes drilled with conductive mud | Guoyu Hu | 2006-05-16 |
| 7038455 | Electromagnetic wave resistivity tool | Randal Thomas Beste, Christopher Golla | 2006-05-02 |
| 7019528 | Electromagnetic wave resistivity tool having a tilted antenna for geosteering within a desired payzone | — | 2006-03-28 |
| 6944546 | Method and apparatus for inversion processing of well logging data in a selected pattern space | Jiaqi Xiao | 2005-09-13 |
| 6911824 | Electromagnetic wave resistivity tool having a tilted antenna for geosteering within a desired payzone | — | 2005-06-28 |
| 6885943 | Simultaneous resolution enhancement and dip correction of resistivity logs through nonlinear iterative deconvolution | Guoyu Hu | 2005-04-26 |
| 6810331 | Fixed-depth of investigation log for multi-spacing multi-frequency LWD resistivity tools | Guoyu Hu | 2004-10-26 |
| 6538447 | Compensated multi-mode elctromagnetic wave resistivity tool | — | 2003-03-25 |
| 6476609 | Electromagnetic wave resistivity tool having a tilted antenna for geosteering within a desired payzone | — | 2002-11-05 |
| 6359438 | Multi-depth focused resistivity imaging tool for logging while drilling applications | — | 2002-03-19 |
| 6353321 | Uncompensated electromagnetic wave resistivity tool for bed boundary detection and invasion profiling | — | 2002-03-05 |
| 6218842 | Multi-frequency electromagnetic wave resistivity tool with improved calibration measurement | Roger P. Bartel | 2001-04-17 |
| 6191586 | Method and apparatus for azimuthal electromagnetic well logging using shielded antennas | — | 2001-02-20 |
| 6163155 | Electromagnetic wave resistivity tool having a tilted antenna for determining the horizontal and vertical resistivities and relative dip angle in anisotropic earth formations | — | 2000-12-19 |
| 5720355 | Drill bit instrumentation and method for controlling drilling or core-drilling | Etienne Lamine, Pierre Stassain, Kees Langeveld, Paul F. Rodney | 1998-02-24 |
| 5389881 | Well logging method and apparatus involving electromagnetic wave propagation providing variable depth of investigation by combining phase angle and amplitude attenuation | Paul F. Rodney | 1995-02-14 |