Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7026813 | Semi-conductive shell for sources and sensors | Dean Homan, Sofia Davydycheva | 2006-04-11 |
| 6969994 | Directional electromagnetic measurements insensitive to dip and anisotropy | Dzevat Omeragic, Richard A. Rosthal | 2005-11-29 |
| 6556015 | Method and system for determining formation anisotropic resistivity with reduced borehole effects from tilted or transverse magnetic dipoles | Dzevat Omeragic | 2003-04-29 |
| 6509738 | Electromagnetic induction well logging instrument having azimuthally sensitive response | Brian Clark, Shu-Kong Chang | 2003-01-21 |
| 6304086 | Method and apparatus for evaluating the resistivity of formations with high dip angles or high-contrast thin layers | Richard A. Rosthal | 2001-10-16 |
| 6216089 | Method and apparatus for producing a conductivity log unaffected by shoulder effect and dip from data developed by a well tool | — | 2001-04-10 |
| 6047240 | Method and apparatus for evaluating the resistivity of invaded formations at high apparent dip angle | Thomas D. Barber, Zlatko Sijercic, Tracy E. Broussard | 2000-04-04 |
| 6023168 | Apparatus and method for measuring the resistivity of underground formations | — | 2000-02-08 |
| 5210691 | Method and apparatus for producing a more accurate resistivity log from data recorded by an induction sonde in a borehole | Robert Freedman | 1993-05-11 |
| 5041975 | Borehole correction system for an array induction well-logging apparatus | John W. Miles | 1991-08-20 |
| 4546314 | Method and apparatus for measuring the inside diameter of a metallic pipe in a well | R. Bruce McCann | 1985-10-08 |
| 4546315 | Apparatus for measuring the inside diameter of a metallic pipe in a well | Gary A. Hazen | 1985-10-08 |