Inserts having two components anchored together at a non-perpendicular angle of attachment for use in rotary type drag bits
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United States of America Patent
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-
Jul 16, 1985
Issued Date -
N/A
app pub date -
Jan 20, 1983
filing date -
Oct 6, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An insert for a rotary type drag bit having two anchored components, an engaging element and a shank, is disclosed. The components are positioned into each other in interfitting relationship with the mating surfaces of the two components being at a non-perpendicular angle to a plane parallel to the front of the engaging element. This insert can then be placed into a receiving feature on the crown of a drill bit. The resulting engaging element to shank interface enables the forces encountered during drilling to be distributed over a larger surface area than conventional flat-on-flat two component attachments so that the bond is less likely to break. The effect of the drilling forces on the engaging element to shank interface is also reduced as the shearing forces are diminished and resolved into compressive forces and the shank provides a support for the interface bond against any remaining shearing forces.
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