1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
Underreamer for Reaming Out Producing-sands.
Patent for "underreaming tools or bits which can be adjusted from the top of the well and which can be set at the required angle..."
Date:
September 21, 1920
Creator:
Lambeth, Acey L.
System:
The Portal to Texas History