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Bit for Well-Drilling Apparatus.
Patent for an expansion bit for a well-drilling apparatus that can be "adjusted and removed without without withdrawing the well tubing, and to provide means whereby a bit capable of drilling a hole sufficiently larger than the well tubing to accommodate a casing may be introduced through the tubing" (lines 11-16).
Date:
April 3, 1894
Creator:
Horton, Stephen A.
System:
The Portal to Texas History