Safety-Casing Clamp
Description:
Patent for a tool that supports the drilling and operating of oil and gas wells. Specifically, the patented tool allows a strong method of sealing the smaller casing inside the larger casing, as the larger casing is pulled out of the well. Includes illustrations.
Date:
March 15, 1921
Creator:
Angus, William M.
Item Type:
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Partner:
UNT Libraries Government Documents Department