Drill Bits With Rolling Cone Reamer Sections
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United States of America Patent
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-
N/A
Issued Date -
Feb 9, 2012
app pub date -
Aug 3, 2010
filing date -
Aug 3, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A drill bit for drilling a borehole in earthen formations comprises a bit body having a central bit axis, a first end adapted to be connected to a drillstring, and a second end opposite the first end. In addition, the bit comprises a pilot bit extending from the second end of the bit body. Further, the bit comprises a reamer section extending radially from the bit body and axially positioned between the first end of the bit body and the pilot bit. The reamer section comprises a rolling cone cutter rotatably mounted to a journal shaft extending from the bit body. Moreover, the rolling cone cutter has a cone axis of rotation, a backface proximal the bit body, and a nose opposite the backface and distal the bit body.
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