Inventor
JOHNSON MIKE H
US3 patents
Patents
3 patentsUS6148933ANov 21, 2000
Steering device for bottomhole drilling assemblies
BAKER HUGHES INC44 citations94
US5957221ASep 28, 1999
Downhole core sampling and testing apparatus
BAKER HUGHES INC40 citations94
US6401840B1Jun 11, 2002
Method of extracting and testing a core from a subterranean formation
BAKER HUGHES INC19 citations91