Reamer-Drill for Well-Boring
Description:
Patent for reamer drills for boring wells. The invention relates to the construction and arrangement of the drill. The drill expands as it leaves the casing to form a drill and reamer, which limits the expansion of the forks.
Date:
September 10, 1918
Creator:
Walker, William M.
Item Type:
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Partner:
UNT Libraries Government Documents Department