Title:
Turbine driven well drilling unit
United States Patent 2340738
Inventors:
Dilley, Garnett D.
Publication Date:
02/01/1944
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Export Citation:
Assignee:
SMITH CORP A O
Primary Class:
Other Classes:
175/107, 415/199.500, 175/393, 415/903, 175/100
International Classes:
E21B4/02; E21B4/00