04811801 is referenced by 266 patents and cites 16 patents.

The present invention is a rock bit insert including a polycrystalline diamond surface on an insert body having a head portion made from a material with elasticity and thermal expansion properties advantageously tailored for use in three types of rock bits, as well as the three types of rock bits made with such inserts. The three types of bits are a roller cone rock bit adapted to be used with mud as the drilling fluid, a roller cone rock bit adapted to be used with air as the drilling fluid, and a percussion rock bit.

Title
Rock bits and inserts therefor
Application Number
7/169232
Publication Number
4811801
Application Date
March 16, 1988
Publication Date
March 14, 1989
Inventor
Bruce L Campbell
Pleasant Grove
UT, US
William J Salesky
Irvine
CA, US
Agent
Willian Brinks Olds Hofer Gilson & Lione
Assignee
Smith International
CA, US
IPC
E21B 10/56
E21B 10/52
C22C 29/08
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