Inventor
JOHNSON JR DONALD L
US5 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSON JR DONALD L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TEXACO INC
4 patentsUS4622518ANov 11, 1986
Deep penetration well logging system and method using secondary electromagnetic fields
TEXACO INC22 citations81
US4972149ANov 20, 1990
Electromagnetic propagation thin bed resistivity well logging system and method
TEXACO INC11 citations72
US4897605AJan 30, 1990
Deep penetration well logging system and method
TEXACO INC8 citations72
US4810970AMar 7, 1989
Oil-based flushed zone electromagnetic well logging system and method
TEXACO INC18 citations71