Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9476857 | Method and apparatus for removal of the double indication of defects in remote eddy current inspection of pipes | Emmanuel Legendre, Thilo Michael Brill, Gerald N. Minerbo | 2016-10-25 |
| 9069097 | Surface to borehole electromagnetic surveying using metallic well casings as electrodes | Hong Zhang | 2015-06-30 |
| 9035657 | Electromagnetic logging between a cased borehole and surface | Hong Zhang | 2015-05-19 |
| 8958989 | Method and apparatus for removal of the double indication of defects in remote eddy current inspection of pipes | Emmanuel Legendre, Thilo Michael Brill, Gerald N. Minerbo | 2015-02-17 |
| 8704523 | Measuring casing attenuation coefficient for electro-magnetics measurements | Cyrille Levesque, David Alumbaugh, Hong Zhang | 2014-04-22 |
| 8638103 | Electromagnetic logging between borehole and surface | Edward Nichols, John R. Lovell, Christopher C. Bogath | 2014-01-28 |
| 8614578 | Attenuation of electromagnetic signals passing through conductive material | Guozhong Gao, H. Frank Morrison, Hong Zhang, David Alumbaugh, Cyrille Levesque | 2013-12-24 |
| 8362780 | Induction coil impedance modeling using equivalent circuit parameters | Hong Zhang | 2013-01-29 |
| 8332191 | Correction factors for electromagnetic measurements made through conductive material | Hong Zhang, Cyrille Levesque, Guozhong Gao, H. Frank Morrison, David Alumbaugh | 2012-12-11 |
| 8326539 | Characterizing at least one property of a liner that lines a well | Frank Morrison, Edward Nichols, Hong Zhang, Luis E. Depavia | 2012-12-04 |
| 8310239 | Detecting electrical current in a magnetic structure | Hong Zhang | 2012-11-13 |
| 7795872 | Determining correction factors representing effects of different portions of a lining structure | Brian Clark, Frank Morrison, Edward Nichols, Hong Zhang | 2010-09-14 |
| 7619540 | Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasion | Stephen D. Bonner, Dean M. Horman, Gerald M. Minerbo, Kuo-Chiang Chen | 2009-11-17 |
| 7536261 | Anti-symmetrized electromagnetic measurements | Dzevat Omeragic, Gerald N. Minerbo | 2009-05-19 |
| 7414391 | Electromagnetic logging tool calibration system | Dean Homan, Gerald N. Minerbo, Thomas D. Barber | 2008-08-19 |
| 7212173 | Flex (or printed) circuit axial coils for a downhole logging tool | Kuo-Chiang Chen | 2007-05-01 |
| 7091877 | Apparatus and methods for determining isotropic and anisotropic formation resistivity in the presence of invasion | Thomas D. Barber, Stephen D. Bonner, Dean Homan, Gerald N. Minerbo, Kuo-Chiang Chen | 2006-08-15 |
| 6969994 | Directional electromagnetic measurements insensitive to dip and anisotropy | Gerald N. Minerbo, Dzevat Omeragic | 2005-11-29 |
| 6937021 | Method and apparatus for determining the presence and orientation of a fraction in an earth formation | — | 2005-08-30 |
| 6933726 | Apparatus and methods for reducing borehole current effects | Kuo-Chiang Chen, Robert C. Smith, Gary A. Hazen, Charles G. Kibbe, Thomas D. Barber +2 more | 2005-08-23 |
| 6710601 | Borehole current correction for tilted or transverse magnetic dipoles on conductive supports | Dean Homan, Thomas D. Barber, Stephen D. Bonner, Brian Clark, Dzevat Omeragic | 2004-03-23 |
| 6693430 | Passive, active and semi-active cancellation of borehole effects for well logging | Jan W. Smits | 2004-02-17 |
| 6690170 | Antenna structures for electromagnetic well logging tools | Dean Homan, Gary A. Hazen, David L. Smith, Thomas D. Barber, Paul Michael Ray +1 more | 2004-02-10 |
| 6680613 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Dean Homan, Thomas D. Barber, Stephen D. Bonner, Brian Clark, Dzevat Omeragic | 2004-01-20 |
| 6630830 | Shielding method and apparatus using flexible strip | Dzevat Omeragic, Jean Seydoux | 2003-10-07 |