Impregnated diamond drill bit construction
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United States of America Patent
Stats
-
Jun 23, 1981
Issued Date -
N/A
app pub date -
May 19, 1978
filing date -
Apr 21, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An impregnated diamond drill bit having a generally cylindrical, hollow crown structure with a lower portion containing diamond particles and a steel shank attached to the crown structure at its upper end. The diamond particles are dispersed within a metal matrix in the lower portion of the crown. Around both the outside circumferential wall and the inside circumferential wall of portions of the crown structure, there are layers of a highly wear resistant material. These layers are formed of a material that is more wear resistant than the material used for the metal matrix in which the diamond particles are dispersed.
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