Title:
TUBING AND PACKING FOR OIL-WELLS.
United States Patent 1173825
Inventors:
MCNALLEN ALBERT J (US)
Application Number:
US1803815A
Filing Date:
03/30/1915
Assignee:
ALBERT J. MCNALLEN
Primary Class:
Other Classes:
166/84.1, 277/518, 277/521
International Classes:
E21B33/08
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