Drill bit having improved journal bearings
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United States of America Patent
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Apr 14, 2020
Grant Date -
Oct 6, 2016
app pub date -
Dec 13, 2013
filing date -
Dec 13, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A disclosed example embodiment includes a drill bit used to form wellbores in subterranean formations. The drill bit includes a drill bit body for coupling to a lower end of a drill string. The drill bit body includes at least one support arm having an inwardly extending journal with a journal bearing having at least one radially reduced pocket extending at least partially circumferentially around the journal bearing including a load side of the journal bearing. At least one rotary cutter assembly is rotatably mounted to the journal. A plurality of cutting elements is disposed on the at least one rotary cutter assembly. At least two independent hardmetal pads are positioned within the at least one radially reduced pocket such that the hardmetal pads have a gap disposed therebetween.
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