Title:
Well logging apparatus and method thereof
United States Patent 2309835
Inventors:
Earl, Fearon Robert
Publication Date:
02/02/1943
Assignee:
WELL SURVEYS INC
Other Classes:
89/1.15, 166/242.4, 175/4.55, 250/261
International Classes:
E21B43/116; F42D1/05; G01V5/12; E21B43/11; F42D1/00; G01V5/00