Method for manufacturing a rotary drill bit having a solid forge

Details Method for manufacturing a rotary drill bit having a solid forge Method for manufacturing a rotary drill bit having a solid forge

1980-04-07

1982-06-08

Parker, Roscoe V.

Metal tools and implements, making

Blank or process

Drill

B21K 502, E21B 908

Patent

active

043333648

ABSTRACT:
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.

REFERENCES:
patent: 2124521 (1938-07-01), Williams et al.
patent: 2644671 (1953-07-01), Ingram
patent: 3420324 (1969-01-01), Vesper
patent: 3850256 (1974-11-01), McQueen
patent: 4043411 (1977-08-01), Lichte
patent: 4098150 (1978-07-01), Penny
patent: 4127043 (1978-11-01), Evans
patent: 4187743 (1980-02-01), Thomas

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