Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6483310 | Retrievable, formation resistivity tool, having a slotted collar | — | 2002-11-19 |
| 5672971 | Well logging system arranged for stable, high-sensitivity reception of propagating electromagnetic waves | James E. Meisner, Ronald A. Hall, Larry W. Thompson, Edward S. Mumby | 1997-09-30 |
| 5402068 | Method and apparatus for logging-while-drilling with improved performance through cancellation of systemic errors through combination of signals, utilization of dedicated transmitter drivers, and utilization of selected reference signals | James E. Meisner, Ronald A. Hall, Larry W. Thompson, Edward S. Mumby | 1995-03-28 |
| 5081419 | High sensitivity well logging system having dual transmitter antennas and intermediate series resonant | James E. Meisner, Ronald A. Hall, Larry W. Thompson, Edward S. Mumby | 1992-01-14 |
| 4785247 | Drill stem logging with electromagnetic waves and electrostatically-shielded and inductively-coupled transmitter and receiver elements | Larry W. Thompson, William R. Grayson | 1988-11-15 |
| 4625173 | System for monitoring formation spontaneous potential and polarization constant while drilling | Macmillan M. Wisler, James R. Birchak | 1986-11-25 |
| 4609873 | Dielectric well logging system with at least three transmitter coils and at least two receiver coils for determining resistivity and dielectric constant of a subsurface formation adjacent a fluid invaded zone of the formation | Percy T. Cox, Roland G. Riedesel, Jr., Kerry D. Savage | 1986-09-02 |
| 4605268 | Transformer cable connector | — | 1986-08-12 |
| 4536713 | Electrical resistivity measurement of a flowing drilling fluid using eddy currents generated therein | Mark H. Davis, Macmillan M. Wisler | 1985-08-20 |
| 4514693 | Dielectric well logging system with electrostatically shielded coils | — | 1985-04-30 |
| 4458524 | Crude oil production stream analyzer | Hans J. Paap | 1984-07-10 |
| 4451789 | Logging tool and method for measuring resistivity of different radial zones at a common depth of measurement | — | 1984-05-29 |
| 4422043 | Electromagnetic wave logging dipmeter | — | 1983-12-20 |
| 4352288 | Measurement of salt content in petroleum flow lines | Hans J. Paap, Dan M. Arnold | 1982-10-05 |
| 4319191 | Dielectric well logging with radially oriented coils | Theodore W. Nussbaum | 1982-03-09 |