Drag bit with improved cutter mount

Details Drag bit with improved cutter mount Drag bit with improved cutter mount

1986-07-08

1987-06-30

Parker, Roscoe V.

Metal tools and implements, making

Blank or process

Drill

175410, 175411, 228132, 228248, B21K 502, E21B 1056

Patent

active

046761241

ABSTRACT:
An earth boring drag bit is shown having polycrystalline diamond cutters mounted in cavities within the body thereof in a manner that, at the juncture of the dissimilar geometry of the cutters and the body, defines voids adjacent the cutters. These voids are filled with a powder tungsten carbide material to a level sufficient to eliminate the voids and is retained therein by a braze material infiltrated into the powder metal, thereby defining a wear-resistant continuous surface immediately adjacent the cutter element.

REFERENCES:
patent: 4265324 (1981-05-01), Morris et al.
patent: 4396077 (1983-08-01), Radtke
patent: 4605157 (1986-08-01), Barr

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