Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10241227 | Method and apparatus to detect formation boundaries ahead of the bit using multiple toroidal coils | — | 2019-03-26 |
| 10042076 | Resistivity imaging using combination capacitive and inductive sensors | Martin Folberth, Eduard Kirchmeier | 2018-08-07 |
| 9075157 | Bending correction for deep reading azimuthal propagation resistivity | — | 2015-07-07 |
| 8786288 | Concentric buttons of different sizes for imaging and standoff correction | Gregory B. Itskovich, Alexandre N. Bespalov, Frank Daschner, Reinhard Knochel | 2014-07-22 |
| 8390295 | Method and apparatus for focusing in resistivity measurement tools using independent electrical sources | Martin Folberth, Christian Fulda | 2013-03-05 |
| 8258790 | Oscillator sensor for determining a property of an earth formation | Martin Folberth, Eduard Kirchmeier | 2012-09-04 |
| 8115490 | Concentric return and transmitter electrodes for imaging and standoff distances compensation | Gregory B. Itskovich, Alexandre N. Bespalov | 2012-02-14 |
| 8049508 | Method and apparatus for determining formation boundary near the bit for conductive mud | — | 2011-11-01 |
| 7928733 | Concentric buttons of different sizes for imaging and standoff correction | Gregory B. Itskovich, Alexandre N. Bespalov | 2011-04-19 |
| 7576543 | Apparatus and method for resistivity measurements during rotational drilling | Rene Ritter, Volker Krueger, Martin Evans | 2009-08-18 |
| 7554329 | Method and apparatus for determining formation resistivity ahead of the bit and azimuthal at the bit | Christian Fulda | 2009-06-30 |
| 7256582 | Method and apparatus for improved current focusing in galvanic resistivity measurement tools for wireline and measurement-while-drilling applications | Martin Folberth, Christian Fulda | 2007-08-14 |
| 7250768 | Apparatus and method for resistivity measurements during rotational drilling | Rene Ritter, Volker Krueger, Martin Evans | 2007-07-31 |