Issued Patents All Time
Showing 51–64 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6680613 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Richard A. Rosthal, Dean Homan, Thomas D. Barber, Stephen D. Bonner, Brian Clark | 2004-01-20 |
| 6630830 | Shielding method and apparatus using flexible strip | Jean Seydoux, Richard A. Rosthal | 2003-10-07 |
| 6624634 | Borehole current correction methods and apparatus | Richard A. Rosthal, Dean Homan, Thomas D. Barber, Stephen D. Bonner, Brian Clark | 2003-09-23 |
| 6597178 | Sensor for detecting the magnetic field in the area of downhole casing | Edward Nichols, Ugo Conti | 2003-07-22 |
| 6594584 | Method for calculating a distance between a well logging instrument and a formation boundary by inversion processing measurements from the logging instrument | Tarek M. Habashy, Cengiz Esmersoy | 2003-07-15 |
| 6584408 | Subsurface formation parameters from tri-axial measurements | — | 2003-06-24 |
| 6573722 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Richard A. Rosthal, Dean Homan, Thomas D. Barber, Stephen D. Bonner, Brian Clark | 2003-06-03 |
| 6566881 | Shielding method and apparatus using transverse slots | Jean Seydoux, Richard A. Rosthal | 2003-05-20 |
| 6557794 | Coil shielding method for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Stephen D. Bonner, Brian Clark, Scott S. Chesser +1 more | 2003-05-06 |
| 6556015 | Method and system for determining formation anisotropic resistivity with reduced borehole effects from tilted or transverse magnetic dipoles | Gerald N. Minerbo | 2003-04-29 |
| 6541979 | Multi-coil electromagnetic focusing methods and apparatus to reduce borehole eccentricity effects | — | 2003-04-01 |
| 6380744 | Shielding apparatus for selective attenuation of an electromagnetic energy field component | Brian Clark, Richard A. Rosthal, Dean Homan, Stephen D. Bonner, Scott S. Chesser +1 more | 2002-04-30 |
| 6351127 | Shielding method and apparatus for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Stephen D. Bonner, Brian Clark, Scott S. Chesser +1 more | 2002-02-26 |
| 6297639 | Method and apparatus for directional well logging with a shield having sloped slots | Brian Clark, Richard A. Rosthal, Dean Homan, Stephen D. Bonner, Scott S. Chesser +1 more | 2001-10-02 |