Issued Patents All Time
Showing 76–100 of 117 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6975243 | Downhole tubular with openings for signal passage | John F. Hunka, Mark Frey, David L. Smith, Dhananjay Ramaswamy, Anthony Collins +1 more | 2005-12-13 |
| 6903660 | Inductively-coupled system for receiving a run-in tool | John F. Hunka, Mark Frey, David L. Smith, Dhananjay Ramaswamy, Anthony Collins +1 more | 2005-06-07 |
| 6863127 | System and method for making an opening in a subsurface tubular for reservoir monitoring | Martin G. Luling, Mark Frey, Dhananjay Ramaswamy, Anthony Collins | 2005-03-08 |
| 6788263 | Replaceable antennas for subsurface monitoring apparatus | John Edwards | 2004-09-07 |
| 6727827 | Measurement while drilling electromagnetic telemetry system using a fixed downhole receiver | John Edwards, John R. Lovell | 2004-04-27 |
| 6710601 | Borehole current correction for tilted or transverse magnetic dipoles on conductive supports | Richard A. Rosthal, Dean Homan, Thomas D. Barber, Stephen D. Bonner, Dzevat Omeragic | 2004-03-23 |
| 6680613 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Richard A. Rosthal, Dean Homan, Thomas D. Barber, Stephen D. Bonner, Dzevat Omeragic | 2004-01-20 |
| 6624634 | Borehole current correction methods and apparatus | Richard A. Rosthal, Dean Homan, Thomas D. Barber, Stephen D. Bonner, Dzevat Omeragic | 2003-09-23 |
| 6614229 | System and method for monitoring a reservoir and placing a borehole using a modified tubular | Martin G. Luling, Mark Frey, Dhananjay Ramaswamy, Anthony Collins | 2003-09-02 |
| 6577244 | Method and apparatus for downhole signal communication and measurement through a metal tubular | John F. Hunka, Mark Frey, David L. Smith, Dhananjay Ramaswamy, Anthony Collins +1 more | 2003-06-10 |
| 6573722 | Method and apparatus for cancellation of borehole effects due to a tilted or transverse magnetic dipole | Richard A. Rosthal, Dean Homan, Thomas D. Barber, Stephen D. Bonner, Dzevat Omeragic | 2003-06-03 |
| 6557794 | Coil shielding method for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner, Scott S. Chesser +1 more | 2003-05-06 |
| 6509738 | Electromagnetic induction well logging instrument having azimuthally sensitive response | Gerald N. Minerbo, Shu-Kong Chang | 2003-01-21 |
| 6380744 | Shielding apparatus for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner, Scott S. Chesser +1 more | 2002-04-30 |
| 6351127 | Shielding method and apparatus for selective attenuation of an electromagnetic energy field component | Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner, Scott S. Chesser +1 more | 2002-02-26 |
| 6308137 | Method and apparatus for communication with a downhole tool | William Brian Underhill, Cengiz Esmersoy, Jean-Michel Hache | 2001-10-23 |
| 6300762 | Use of polyaryletherketone-type thermoplastics in a production well | Stanley R. Thomas | 2001-10-09 |
| 6297639 | Method and apparatus for directional well logging with a shield having sloped slots | Richard A. Rosthal, Dean Homan, Dzevat Omeragic, Stephen D. Bonner, Scott S. Chesser +1 more | 2001-10-02 |
| 5594343 | Well logging apparatus and method with borehole compensation including multiple transmitting antennas asymmetrically disposed about a pair of receiving antennas | Peter Wu, Victor E. Grijalva | 1997-01-14 |
| 5359324 | Well logging apparatus for investigating earth formations | Stephen D. Bonner, Jacques Jundt, Martin G. Luling | 1994-10-25 |
| 5339036 | Logging while drilling apparatus with blade mounted electrode for determining resistivity of surrounding formation | Stephen D. Bonner, Jacques Jundt, Martin G. Luling | 1994-08-16 |
| 5235285 | Well logging apparatus having toroidal induction antenna for measuring, while drilling, resistivity of earth formations | Stephen D. Bonner, Jacques Jundt, Martin G. Luling | 1993-08-10 |
| 5200705 | Dipmeter apparatus and method using transducer array having longitudinally spaced transducers | Stephen D. Bonner, Jacques Jundt, Martin G. Luling, Richard A. Rosthal | 1993-04-06 |
| 4968940 | Well logging apparatus and method using two spaced apart transmitters with two receivers located between the transmitters | Jacques Jundt, Martin G. Luling, Michael O. Ross | 1990-11-06 |
| 4949045 | Well logging apparatus having a cylindrical housing with antennas formed in recesses and covered with a waterproof rubber layer | Jacques Jundt, Martin G. Luling, Michael O. Ross | 1990-08-14 |