PARTICLE EXCLUSION AND ACCUMULATION PREVENTION USING NANOFOREST FILTERS ON DOWNHOLE TOOLS
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United States of America Patent
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Issued Date -
Oct 6, 2016
app pub date -
Mar 12, 2014
filing date -
Mar 12, 2014
priority date (Note) -
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Abstract
A reaming tool includes a tubular body having an axial cavity and a plurality of housings. Each of the housings has an opening through a periphery of the tubular body. A cutter element is positioned in each of the housings, and the cutter element is movable between a retracted position and an extended position. A drive mechanism is positioned within the tubular body and is movable relative to the tubular body to extend or retract each cutter element. A gap is defined between the drive mechanism and the tubular body. A carbon nanotube forest is coupled to one of the drive mechanism and the tubular body to reduce or prevent accumulation of particles in the gap.
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