Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6765380 | Determining wettability of an oil reservoir using borehole NMR measurements | Martin Hurlimann | 2004-07-20 |
| 6703832 | Method for detecting hydrocarbons by comparing NMR response at different depths of investigation | Nicholas J. Heaton | 2004-03-09 |
| 6459992 | Method and apparatus for determining logging tool displacements | Luis E. Depavia, Abdurrahman Sezginer | 2002-10-01 |
| 6242893 | Lithium-ion and lithium polymer battery recharging | — | 2001-06-05 |
| 6229308 | Formation evaluation using magnetic resonance logging measurements | — | 2001-05-08 |
| 6147489 | Method and apparatus for measuring total nuclear magnetic resonance porosity | Christopher E. Morriss, Austin Boyd, Charles Flaum | 2000-11-14 |
| 6032101 | Methods for evaluating formations using NMR and other logs | Chanh Cao Minh | 2000-02-29 |
| 5486762 | Apparatus including multi-wait time pulsed NMR logging method for determining accurate T2-distributions and accurate T1/T2 ratios and generating a more accurate output record using the updated T2-distributions and T1/T2 ratios | Christopher E. Morriss | 1996-01-23 |
| 5451873 | Method and apparatus for determining the in situ larmor frequency of a wellbore NMR tool to compensate for accumulation of magnetic material on the magnet housing of the tool | John Edward Smaardyk, Jason P. MacInnis | 1995-09-19 |
| 5381092 | Method and apparatus for compressing data produced from a well tool in a wellbore prior to transmitting the compressed data uphole to a surface apparatus | — | 1995-01-10 |
| 5291137 | Processing method and apparatus for processing spin echo in-phase and quadrature amplitudes from a pulsed nuclear magnetism tool and producing new output data to be recorded on an output record | — | 1994-03-01 |
| 5210691 | Method and apparatus for producing a more accurate resistivity log from data recorded by an induction sonde in a borehole | Gerald N. Minerbo | 1993-05-11 |
| 5168234 | Method and apparatus for measuring azimuthal as well as longitudinal waves in a formation traversed by a borehole | — | 1992-12-01 |
| 4916616 | Self-consistent log interpretation method | John E. Puffer | 1990-04-10 |
| 4360778 | High frequency induction log for locating formation interfaces | — | 1982-11-23 |
| 4329647 | Method for determining distance and direction from an open well to a cased well using resistivity and directional survey data | — | 1982-05-11 |
| 4319220 | Alarm system for monitoring pressurized vehicular tires | Dennis G. Pappas, Matthew C. Baum, Samuel N. Small, Robert Adams | 1982-03-09 |
| 4278941 | High frequency induction log for determining resistivity and dielectric constant of the earth | — | 1981-07-14 |
| 4220907 | Electromagnetic power generator | Dennis G. Pappas, Matthew C. Baum, Samuel N. Small, Robert Adams | 1980-09-02 |