Steerable underreaming bottom hole assembly and method
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United States of America Patent
Stats
-
Feb 1, 2005
Grant Date -
May 27, 2004
app pub date -
Oct 28, 2002
filing date -
Sep 18, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A steerable bottom hole assembly may be used for drilling both a curved section and straight section of the borehole, with the bottom hole assembly including a reamer beneath the downhole motor 12. The bottom hole assembly includes a bit 30 having a bit face defining a bit diameter, and a gauge section 32 having a substantially uniform diameter cylindrical surface approximating the bit diameter and having an axially length of at least 75% of the bit diameter. The motor is preferably run slick without stabilizers for engaging the wall of the borehole.
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