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Pipe-Cutter

Description: Patent for improved pipe cutters that indicate when a pipe has been completely severed inside of a well
Date: May 11, 1920
Creator: Wright, John F.
Partner: UNT Libraries Government Documents Department

Hoisting Drum

Description: Patent for improvements to hoisting drums for use in drilling oil, gas, and water wells, with the object being "to employ a plurality of hoisting drums upon the same shaft so that the cable may be wound partly on one drum and partly on another" (lines 73-76) such that the danger of cable cutting is decreased and the speed of operation is increased, including illustrations.
Date: May 2, 1922
Creator: Suman, John R. & Gamble, Adrian R.
Partner: UNT Libraries Government Documents Department

Apparatus for Raising Liquids from Deep Wells.

Description: Patent for improvements for raising liquids from deep wells. "It has a particular application to the raising of fused sulfur from the well in the liquid state" (lines 14-16).
Date: May 11, 1920
Creator: Hebert, Joseph A.
Partner: UNT Libraries Government Documents Department
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