Rotary drill bits
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 10, 1983
Grant Date -
N/A
app pub date -
Jan 9, 1981
filing date -
Jan 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a rotary drilling bit having preform cutting elements, a partial or total structural discontinuity is disposed between the elements and the underlying structure or within the underlying structure to reduce the bending strain upon the preform cutting elements. In this way there is a reduction in the fracture or damage of preform cutting elements.
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