Title:
Logging-while-drilling system
United States Patent 3309656

Inventors:
Godbey, John K.
Publication Date:
03/14/1967
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Assignee:
MOBIL OIL CORP
Primary Class:
367/85
Other Classes:
324/323, 73/152.160
International Classes:
E21B47/06; E21B47/18; E21B47/12
US Patent References:
3202899Motor control system
3242410Circuit for controlling energization of a direct current load