Issued Patents All Time
Showing 26–50 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7556105 | Closed loop drilling assembly with electronics outside a non-rotating sleeve | — | 2009-07-07 |
| 7503403 | Method and apparatus for enhancing directional accuracy and control using bottomhole assembly bending measurements | Pushkar N. Jogi, Michael Neubert, John D. Macpherson, James A. Hood, Thomas Dahl +2 more | 2009-03-17 |
| 7477161 | Bidirectional telemetry apparatus and methods for wellbore operations | John D. Macpherson, Frank W. Shepard, Ralf Zaeper | 2009-01-13 |
| 7434631 | Apparatus and method of controlling motion and vibration of an NMR sensor in a drilling BHA | Thomas Kruspe, Hans-Juergen Faber, Johannes Witte | 2008-10-14 |
| 7416023 | Formation pressure testing apparatus with flexible member and method of formation pressure testing | Sven Krueger, Wolfgang E. Herberg, Gunnar Bothmann, Matthias Meister | 2008-08-26 |
| 7413032 | Self-controlled directional drilling systems and methods | — | 2008-08-19 |
| 7405563 | Compensation of magnetic influence in a MWD system | Thomas Kruspe, Martin Blanz, Roland E. Chemali | 2008-07-29 |
| 7400262 | Apparatus and methods for self-powered communication and sensor network | Roland E. Chemali, Peter Aronstam, Roger Fincher, Larry Watkins | 2008-07-15 |
| 7353887 | Control systems and methods for active controlled bottomhole pressure systems | Sven Krueger, Harald Grimmer, Larry Watkins, Peter Aronstam, Peter Fontana +1 more | 2008-04-08 |
| 7306060 | Drilling assembly with a steering device for coiled-tubing operations | Thomas Kruspe, Carsten Freyer, Hans-Juergen Faber | 2007-12-11 |
| 7250768 | Apparatus and method for resistivity measurements during rotational drilling | Rene Ritter, Matthias Gorek, Martin Evans | 2007-07-31 |
| 7185715 | Apparatus and method of controlling motion and vibration of an NMR sensor in a drilling bha | Thomas Kruspe, Hans-Juergen Faber, Johannes Witte | 2007-03-06 |
| 7174975 | Control systems and methods for active controlled bottomhole pressure systems | Sven Krueger, Harald Grimmer, Roger Fincher, Larry Watkins, Peter Aronstam +1 more | 2007-02-13 |
| 7114581 | Active controlled bottomhole pressure system & method | Peter Aronstam, Sven Krueger, Harald Grimmer, Roger Fincher, Larry Watkins +1 more | 2006-10-03 |
| 7096975 | Modular design for downhole ECD-management devices and related methods | Peter Aronstam, Sven Krueger, Harald Grimmer, Roger Fincher, Larry Watkins +1 more | 2006-08-29 |
| 7083006 | Non-rotating sensor assembly for measurement-while-drilling applications | Thomas Kruspe | 2006-08-01 |
| 7063174 | Method for reservoir navigation using formation pressure testing measurement while drilling | Roland E. Chemali, Tron B. Helgesen, Matthias Meister, Per-Erik Berger, Peter Aronstam | 2006-06-20 |
| 7028789 | Drilling assembly with a steering device for coiled-tubing operations | Thomas Kruspe, Carsten Freyer, Hans Jurgen Faber | 2006-04-18 |
| 6981561 | Downhole cutting mill | Sven Krueger, Harald Grimmer, Joerg Christanseen, Volker Peters | 2006-01-03 |
| 6957698 | Downhole activatable annular seal assembly | Harald Grimmer, Sven Krueger | 2005-10-25 |
| 6913095 | Closed loop drilling assembly with electronics outside a non-rotating sleeve | — | 2005-07-05 |
| 6907944 | Apparatus and method for minimizing wear and wear related measurement error in a logging-while-drilling tool | Matthew Sale, Cornelis Huiszoon, Phillip Lawrence Kurkoski, Harald Grimmer | 2005-06-21 |
| 6891481 | Resonant acoustic transmitter apparatus and method for signal transmission | Vladimir Dubinsky | 2005-05-10 |
| 6837314 | Sub apparatus with exchangeable modules and associated method | Wolfgang E. Herberg, Gunnar Bothmann, Matthias Meister, Sven Krueger | 2005-01-04 |
| 6769497 | Use of axial accelerometer for estimation of instantaneous ROP downhole for LWD and wireline applications | Vladimir Dubinsky, Pushkar N. Jogi, James V. Leggett, III, Douglas J. Patterson, Alexei Bolshakov | 2004-08-03 |