Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5642051 | Method and apparatus for surveying and monitoring a reservoir penetrated by a well including fixing electrodes hydraulically isolated within a well | Kamal Babour, Ashok Belani | 1997-06-24 |
| 5596142 | Well logging apparatus comprising a measuring pad and a combinaton device including such apparatus | Alain G. M. Delpuech, David C. Hoyle, Alan J. Sallwasser | 1997-01-21 |
| 5528556 | Combination well logging device | Alain G. M. Delpuech, David C. Hoyle | 1996-06-18 |
| 5399971 | Method and apparatus for evaluating formation resistivity using focused annular and azimuthal electrodes | Jean-Claude Trouiller | 1995-03-21 |
| 5396175 | Method and apparatus for evaluating formation resistivity using focused annular and azimuthal electrodes | — | 1995-03-07 |
| 5067090 | Nuclear spectroscopy method and apparatus for digital pulse height analysis | — | 1991-11-19 |
| 5053620 | Logging apparatus and method for determining concentrations of subsurface formation elements | Donald C. McKeon | 1991-10-01 |
| 4885723 | Acoustic apparatus and method for detecting borehole wall discontinuities such as vertical fractures | R. Mark Havira | 1989-12-05 |
| 4827457 | Method and apparatus for acoustically measuring the transverse dimensions of a borehole | Georges L. F. Benoit | 1989-05-02 |
| 4661933 | Method and apparatus for acoustically measuring the transverse dimensions of a borehole | Benoit Froelich | 1987-04-28 |
| 4649822 | Method and apparatus for deactivating a partially flooded perforating gun assembly | — | 1987-03-17 |
| 4607352 | Method and apparatus for obtaining a display of a characteristic of the periphery of a well | Francois J. Cortet | 1986-08-19 |
| 4433240 | Method and apparatus for measuring gamma rays in a borehole | — | 1984-02-21 |
| 4367541 | Apparatus and method for determining velocity of acoustic waves in earth formations | — | 1983-01-04 |