Rotary drill bit having a solid forged, unitary body
Patent
·
OSTI ID:6259780
A rotary drill bit for use on a rotating drill string includes a solid forged unitary main body having a plurality of downwardly facing hemi-cylindrical body surfaces. A plurality of cutter bases are provided, each cutter base including an upwardly facing hemi-cylindrical base surface that is fused to one of the body surfaces by electron beam welding. Each cutter base includes a bearing pin extending inwardly with respect to the bit. A cone shaped cutter is rotatably mounted on the bearing pin for rotating about the bearing pin during drilling operations to bore through earth formations.
- Assignee:
- Varel Mfg Co
- Patent Number(s):
- US 4256194
- OSTI ID:
- 6259780
- Country of Publication:
- United States
- Language:
- English
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