Bit for Well-Drilling Apparatus.
Description:
Patent for a rotary expansion bit for use with well-drilling apparatuses. The bit can be adjusted without removing the well tubing, and can drill a hole large than the tubing in order to insert casing sections.
Date:
April 22, 1902
Creator:
Sloan, James W.
Item Type:
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Partner:
UNT Libraries Government Documents Department