CLEANING TOOL AND A METHOD FOR TREATING AN INNER SURFACE OF A CASING
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United States of America Patent
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Issued Date -
Oct 23, 2014
app pub date -
Nov 29, 2012
filing date -
Nov 30, 2011
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Abstract
The present invention relates to a cleaning tool for cleaning and treating an inner surface of a downhole casing. The cleaning tool comprises a tool housing, a mechanical cleaning tool section comprising mechanical cleaning elements for releasing elements of the inner surface of the casing in order to clean the casing to become substantially free from rigid debris and other precipitated materials, and a jetting tool section for ejecting an enzyme-containing fluid onto the cleaned inner surface. The jetting tool section comprises a fluid chamber comprising the enzyme-containing fluid, and a nozzle head comprising at least one nozzle. The invention further relates to a method for treating an inner surface of a casing by means of the cleaning tool.
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