Methods and fluid compositions for depositing and removing filter cake in a well bore
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United States of America Patent
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Jan 10, 2006
Grant Date -
Sep 9, 2004
app pub date -
Mar 5, 2003
filing date -
Mar 5, 2003
priority date (Note) -
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Abstract
The current invention provides methods of using and drilling and servicing fluid compositions for depositing and removing filter cake from the walls of a well bore. The compositions make use of particulate solid bridging agent comprised of a salt of an organic acid. The bridging particles are dissolvable by a clean-up solution comprised of a mild solvent that is less corrosive than the conventional strong mineral acids used for this purpose.
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