Earth-boring bit with an advantageous insert cutting structure
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United States of America Patent
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Jun 28, 1994
Issued Date -
N/A
app pub date -
Dec 17, 1992
filing date -
Sep 23, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An earth-boring bit is provided with three cutters, at least one of the three cutters are provided with a heel cutting structure defined by a plurality of heel inserts having crests thereon, the heel inserts being disposed in at least one substantially circumferential heel row and the crests of the heel inserts being generally aligned traversely to the rotational axis of the cutter. At least another of the cutters is provided with a substantially circumferential row of axial inserts having crests thereon disposed proximally to the base of the cutter, the crests of the axial inserts being generally aligned with the axis of rotation of the cutter.
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