Drill.
Description:
Patent for a simple, durable, and effective drill that "automatically expand[s] in the bottom of the well below the tubing, to cut a hole sufficiently large for the tubing without requiring a second drilling or reaming process" (lines 11-15).
Date:
September 25, 1894
Creator:
Lindholm, Charlie M.
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department