Retractable Underreamer
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United States of America Patent
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N/A
Issued Date -
Jun 30, 2011
app pub date -
Dec 28, 2009
filing date -
Dec 28, 2009
priority date (Note) -
Abandoned
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Abstract
An underreamer is provided in which the cutting elements are retracted into the tool body during run in, extensible for the performance of cutting operations, and retractable into the body of the tool afterwards.
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