Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8443883 | Apparatus and method for detecting poor hole cleaning and stuck pipe | Andreas Peter | 2013-05-21 |
| 7576543 | Apparatus and method for resistivity measurements during rotational drilling | Matthias Gorek, Volker Krueger, Martin Evans | 2009-08-18 |
| 7389828 | Apparatus and method for mechanical caliper measurements during drilling and logging-while-drilling operations | Hans-Christian Freitag, Hans-Juergen Faber, James Kinney | 2008-06-24 |
| 7250768 | Apparatus and method for resistivity measurements during rotational drilling | Matthias Gorek, Volker Krueger, Martin Evans | 2007-07-31 |
| 6957708 | Electrical imaging in conductive and non-conductive mud | Roland E. Chemali, Martin Folberth, Tsili Wang | 2005-10-25 |
| 6850068 | Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit) | Roland E. Chemali, Paul E. Pastusek, Friedhelm Makohl, Martin Evans, Stanley T. Hewitt | 2005-02-01 |