ROLLER CUTTER DRILL BIT WITH MIXED BEARING TYPES
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United States of America Patent
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Issued Date -
Apr 2, 2015
app pub date -
Sep 25, 2014
filing date -
Oct 2, 2013
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Abandoned
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Abstract
A roller cutter drill bit with mixed bearing types includes a bit body with at least one journal facet and a cavity facet. A cavity extends into the bit body from the cavity facet. The bit body is configured to rotate about a bit axis during drilling. A journal extends outward from the at least one journal facet. A first rotatable cutter that supports a first plurality of cutting structures has a journal portion received by the cavity. A second rotatable cutter that supports a second plurality of cutting structures has a cavity portion that is receives the journal.
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