Title:
Expansible rotary drill bit and cutter
United States Patent 2644673
US Patent References:
Hydraulic expander for well drills and the like
- - 1483611

Boring tool
- - 1821474

Combined drill and underreamer
- - 1887895

Well drilling bit
- - 1923487

Well bit
- - 1923488


Inventors:
Baker, John R.
Publication Date:
07/07/1953
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Assignee:
BAKER OIL TOOLS INC
Primary Class:
175/285
Other Classes:
175/269, 175/426, 175/287
International Classes:
E21B10/32; E21B10/26
US Patent References:
1973657Well drilling bit and its process of manufacture
1992546Reamer and well scraper
2057209Method of making a hard faced cutter
2337322Cutting tool having tip or insert of tungsten carbide or like hard materials