Annular mill for use in oil wells
United States Patent 2833520
US Patent References:
/1163867.html
- - 1163867

Rotary orill bit
- - 1471526

Composite bit
- - 1519135

Rotary bit
- - 2121202

Drill bit
- - 2268775


Inventors:
Owen, Robert G.
Publication Date:
05/06/1958
View Patent Images:
Download PDF 2833520 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
Owen, Robert G.
Primary Class:
175/379
Other Classes:
D15/21, 175/406, 175/425
International Classes:
F16B13/13
US Patent References:
2371488Core bit