Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7400262 | Apparatus and methods for self-powered communication and sensor network | Volker Krueger, Peter Aronstam, Roger Fincher, Larry Watkins | 2008-07-15 |
| 7375530 | Method for signal enhancement in azimuthal propagation resistivity while drilling | Paul Cairns, Tsili Wang, Wallace H. Meyer, Andrew Brooks, Otto N. Fanini +1 more | 2008-05-20 |
| 7114565 | Measurement-while-drilling assembly using real-time toolface oriented measurements | Robert A. Estes | 2006-10-03 |
| 7063174 | Method for reservoir navigation using formation pressure testing measurement while drilling | Tron B. Helgesen, Volker Krueger, Matthias Meister, Per-Erik Berger, Peter Aronstam | 2006-06-20 |
| 6957708 | Electrical imaging in conductive and non-conductive mud | Martin Folberth, Tsili Wang, Rene Ritter | 2005-10-25 |
| 6850068 | Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit) | Paul E. Pastusek, Friedhelm Makohl, Rene Ritter, Martin Evans, Stanley T. Hewitt | 2005-02-01 |
| 6377050 | LWD resistivity device with inner transmitters and outer receivers, and azimuthal sensitivity | Russell Lloyd Dummer | 2002-04-23 |
| 6020741 | Wellbore imaging using magnetic permeability measurements | Dale R. Heysse | 2000-02-01 |
| 5892460 | Logging while drilling tool with azimuthal sensistivity | Al Jerabek | 1999-04-06 |
| 5448171 | Method for variable radial depth induction log | Paul L. Sinclair | 1995-09-05 |
| 5446654 | Shoulder effect logging method | David Orlando Torres | 1995-08-29 |
| 5428293 | Logging while drilling apparatus with multiple depth of resistivity investigation | Paul L. Sinclair, Shey-Min Su | 1995-06-27 |
| 5239267 | Method for improving the accuracy of dip determination using adjustable high pass filters | Shey-Min Su, Joseph F. Goetz | 1993-08-24 |
| 5191290 | Logging apparatus for measurement of earth formation resistivity | Stanley C. Gianzero | 1993-03-02 |
| 5045795 | Azimuthally oriented coil array for MWD resistivity logging | Stanley C. Gianzero, Paul L. Sinclair, Shey-Min Su | 1991-09-03 |
| 5038107 | Method and apparatus for making induction measurements through casing | Stanley C. Gianzero, Paul L. Sinclair, Shey-Min Su | 1991-08-06 |
| 4918669 | Method and apparatus for sonic dip measurement | Voldi E. Maki, Jr. | 1990-04-17 |
| 4646026 | Method and apparatus for measuring resistivity of an earth formation | William C. Dirk | 1987-02-24 |
| 4319192 | Deep and/or shallow electrical resistivity investigation suitable for dual resistivity-induction logging | Jacques R. Tabanou | 1982-03-09 |