Rotary drill bit
Patent
·
OSTI ID:6416967
An improved rotary drill bit is described comprised of two or more elongated generally cylindrical drill members the lower ends of which form a cutting face. Each of the drill members includes a plurality of vertically spaced rows of diamond-shaped openings disposed, or formed, in the sides, or wall, thereof, the openings in adjacent rows being offset from each other and overlapping at their upper and lower ends whereby as the lower ends of the drill member wear away, cutting edges are continuously formed thereon by the diamond-shaped openings.
- Assignee:
- IFI; EDB-81-075443
- Patent Number(s):
- US 4230193
- OSTI ID:
- 6416967
- Country of Publication:
- United States
- Language:
- English
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