04802539 is referenced by 149 patents and cites 31 patents.

A roller cone rock bit is disclosed with an improved bearing system. The improvement comprises a main journal bearing which is substantially frustoconically shaped and a main roller cone bearing which is reverse shaped to mate with the journal bearing. The journal and roller cone bearings comprise polycrystalline diamond. The invention also includes a member for retaining the roller cone on the journal.

Title
Polycrystalline diamond bearing system for a roller cone rock bit
Application Number
684849
Publication Number
4802539
Application Date
January 11, 1988
Publication Date
February 7, 1989
Inventor
Donald G Cross
Laguna Beach
CA, US
David R Hall
Provo
UT, US
Agent
Willian Brinks Olds Hofer Gilson & Lione
Assignee
Smith International
CA, US
IPC
F21B 10/46
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