Method for use in a wellbore
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United States of America Patent
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Mar 9, 2010
Grant Date -
Apr 9, 2009
app pub date -
Dec 15, 2008
filing date -
Mar 28, 2006
priority date (Note) -
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Abstract
An apparatus for use in a wellbore comprises a heat insulating container having an inner space and having a structure defining a hollow containing a vacuum. The apparatus further comprises a reflective layer arranged on a surface of the heat insulating container to reflect heat for reducing radiated heat originated in the wellbore from reaching the inner space. Also, a signal-activated detonator is provided in the inner space of the heat insulating container.
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