REAMER ROLLER CONE BIT WITH STEPPED REAMER CUTTER PROFILE

A bottom hole assembly including a pilot bit for initially forming an unconfined inner sidewall of a wellbore and a reamer tool above the pilot bit and comprising a first cutter ring to expand the unconfined inner sidewall, and a second cutter ring located above and outwardly of the first cutter rin...

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Bibliographic Details
Main Author BUSKE ROBERT J
Format Patent
LanguageEnglish
Published 22.04.2010
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:A bottom hole assembly including a pilot bit for initially forming an unconfined inner sidewall of a wellbore and a reamer tool above the pilot bit and comprising a first cutter ring to expand the unconfined inner sidewall, and a second cutter ring located above and outwardly of the first cutter ring to expand the unconfined inner sidewall as expanded by the first cutter ring. The reamer tool may further comprise a third cutter ring located above and outwardly of the second cutter ring to expand the unconfined inner sidewall as expanded by the second cutter ring. The first cutter ring may be located on a first roller cone, the second cutter ring may be located on a second roller cone, and the third cutter ring may be located on a third roller cone.
Bibliography:Application Number: US20080253778