03987859 is referenced by 73 patents and cites 9 patents.

A rotary rock bit is formed from at least two individual segments. The individual segments are positioned together and aligned in the proper position for the final assembled bit. The seams between the individual segments are in the form of square-butt type joints and the adjoining segments have surface areas that are in abutting relationship to each other. A beam of energy such as an electron beam or a laser beam is directed into the seams. Relative movement between the beam and segments of the bit causes the beam to traverse the seams and join said individual segments together throughout substantially all of said abutting surface areas.

Title
Unitized rotary rock bit
Application Number
409207
Publication Number
3987859
Application Date
May 15, 1975
Publication Date
October 26, 1976
Inventor
Carl Laurent Lichte
Dallas
TX, US
Agent
Eddie E Scott
Assignee
Dresser
TX, US
IPC
E21B 9/35
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