04624830 is referenced by 21 patents and cites 5 patents.

A method of manufacturing by a powder metallurgy process a rotary drill bit including a bit body having a plurality of cutting elements mounted on the outer surface thereof comprises the steps of forming a hollow mould for moulding at least a portion of the bit body, packing the mould with powdered matrix material, and infiltrating the material with a metal alloy in a furnace to form a matrix. Before packing the mould with powdered matrix material, there are positioned in spaced locations on the interior surface of the mould a plurality of cutting elements, each of which is formed of a material, such as a polycrystalline diamond material, which is thermally stable at the temperature necessary to form the matrix. Also positioned in the mould, adjacent the rearward side of each cutting element, is a support material such that, at least after formation of the matrix, the support material has a higher modulus of elasticity than the matrix.

Title
Manufacture of rotary drill bits
Application Number
6/676697
Publication Number
4624830
Application Date
November 30, 1984
Publication Date
November 25, 1986
Inventor
John D Barr
Cheltenham
GB
Agent
William E Johnson Jr
Assignee
NL Petroleum Products
GB
IPC
B22F 7/00
View Original Source