Rotary rock bit and method of making same
Patent
·
OSTI ID:5955629
A rotary rock bit is described having a one piece bit body with a plurality of legs extending downwardly therefrom. Each leg includes an annular bore extending therethrough for receiving the mounting end of a separate journal pin. Each journal pin also includes a bearing end for rotatively supporting a cone type cutter. Cone retention members are operatively engaged to each journal pin for retaining the cone cutter on each journal pin. In assembly the cone cutters, with the retention members contained therein, are positioned interior of the legs of the one piece bit body in their operative location. The journal pins are then inserted through the leg bores until they extend into the cavities of the respective cone cutters. Each journal pin is then secured to a respective leg and the retention members are secured to the journal pins, preferably by electron beam welding techniques.
- Assignee:
- Smith International Inc
- Patent Number(s):
- US 4266622
- OSTI ID:
- 5955629
- Country of Publication:
- United States
- Language:
- English
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