Means and method of centrally positioning alpha tube within an open well hole
United States Patent 1959368

Inventors:
Benton, Kennedye Charles
Publication Date:
05/22/1934
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Assignee:
KENNEDYE OIL FIELD DEVICES INC
Primary Class:
166/285
Other Classes:
175/325.500, 138/114
International Classes:
E21B17/10; E21B17/22; E21B33/14; E21B17/00; E21B33/13