Expandable downhole tool apparatus
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United States of America Patent
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Sep 15, 2015
Issued Date -
N/A
app pub date -
Aug 20, 2010
filing date -
Aug 21, 2009
priority date (Note) -
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Abstract
An expandable downhole tool apparatus includes a body adapted to be incorporated into a drill string and at least one working member moveable relative to the body between an inward deactivated position and an outwardly deployed activated position in order to engage the wall of a borehole. An activation device moves at least one working member between the inward deactivated position and outwardly deployed activated position. At least one passage is formed through the body and extends from a location on the body adjacent at least one working member to a location remote from the respective working member to enable debris accumulating underneath the respective working member to move along the passage and exit the body.
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