| 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 |
