Title:
Formation resistivity measurement while drilling, utilizing physical conditions representative of the signals from a toroidal coil located adjacent the drilling bit
United States Patent 3408561
Inventors:
Redwine, Fletcher H.
Osborn, William F.
Application Number:
US29829863A
Publication Date:
10/29/1968
Filing Date:
07/29/1963
Assignee:
ARPS CORP
Primary Class:
International Classes:
E21B47/01; E21B47/18; G01V3/26; G01V3/28
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