|
US2754475A
|
Borehole diameter and lateral depth of fluid invasion indic… |
Expired / Lapsed
|
1949-01-28 |
1956-07-10 |
2 |
Details
|
|
US2393009A
|
Electrical well logging method and apparatus |
Expired / Lapsed
|
1942-11-03 |
1946-01-15 |
0 |
Details
|
|
US2288876A
|
Magnetic logging |
Expired / Lapsed
|
1941-01-21 |
1942-07-07 |
0 |
Details
|
|
US2255754A
|
Multiple record electrologging of wells |
Expired / Lapsed
|
1939-03-08 |
1941-09-16 |
0 |
Details
|