06109375 is referenced by 30 patents and cites 25 patents.

A method and apparatus are provided for use in fabricating rotary cone drill bits from multiple drill bit segments. Each drill bit segment (40) preferably includes a first portion (50) with mating surfaces (61, 62) designed to be aligned with mating surfaces (61, 62) of other drill bit segments (40) and a second portion (80) which includes a support arm (90) with a cutter cone assembly (100) rotatably mounted thereon. A recess (70) having a generally spherical surface is formed within the first portion (50) of each drill bit segment (40) such that when the respective drill bit segments (40) are aligned with each other, the spherical recesses (70) cooperate with each other to define a generally spherical cavity. A ball (72) is disposed within the resulting spherical cavity when the drill bit segments are joined with each other to form the bit body (42) for the resulting rotary cone drill bit (20). The ball (72) and spherical recesses (70) cooperate with each other to allow alignment of the respective drill bit segments (40) relative to each other prior to welding.

Title
Method and apparatus for fabricating rotary cone drill bits
Application Number
9/248720
Publication Number
6109375
Application Date
February 10, 1999
Publication Date
August 29, 2000
Inventor
Lawrence L Tso
Glenn Heights
TX, US
Agent
Groover & Associates
Assignee
Dresser
TX, US
IPC
E21B 10/20
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