Cutter mounting for drag bits
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 28, 1988
Grant Date -
N/A
app pub date -
May 19, 1987
filing date -
May 19, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved method and apparatus for supporting a cutting member in a drag bit wherein the cutting member includes a cylindrical stud or body having an angularly disposed cylindrical portion projecting therefrom with a cutting wafer bonded to the face of the cylindrical portion. A hole is formed in the bit body with an angular recess intersecting the hole. The recess conforms generally to the configuration of the cylindrical portion so that in the preferred form of the invention, the bit body engages the cylindrical portion to prevent rotation of the cutter in the bit body. Also, the engagement between the bit body and the cylindrical portion occurs in such a matter as to avoid a contact between the bit body and the wafer thus avoiding imposing stresses on the cutting wafer. The engagement aids in preventing fluid erosion and in orienting the cutting member in the bit body during assembly.
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