Resource Type
Counties
3 Matching Results
Results open in a new window/tab.
Results:
1 - 3 of
3
Well-Drilling Device.
Patent for well drilling device with new and useful improvements in well-drilling device for simultaneously drilling the main hole and an advance or "rat-tail" hole.
Date:
March 1, 1921
Creator:
Smith, Primus W. & Bookhout, John J.
System:
The Portal to Texas History
Well-Drilling Bit.
Patent for Well-Drilling Bit designed to cut faster, disassemble for easier sharpening, and reduce cost.
Date:
June 20, 1921
Creator:
Smith, Primus W.
System:
The Portal to Texas History
Drill-Bit
Patent for new improvement in drill-bits. The object of the invention is to "provide the driller with advanced knowledge of the formation into which he is about to extend his main hole".
Date:
January 11, 1921
Creator:
Smith, Primus W.; Bookhout, John J. & Monce, Edwin W.
System:
The Portal to Texas History