Method for servicing subterranean wells
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United States of America Patent
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Aug 26, 2014
Grant Date -
Jul 12, 2012
app pub date -
Aug 12, 2010
filing date -
Aug 28, 2009
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Abstract
Methods for sealing voids and cracks in subterranean-formation rock that contains carbonate minerals, thereby minimizing or stopping fluid flow between the formation rock and the wellbore of a subterranean well, comprise pumping a solution of one or more lattices that contains at least one carboxylated monomer down a well during drilling and allowing it to enter voids (e.g., pores, fractures, vugs and caverns) in the carbonate-containing formation. The solution reacts with divalent cations liberated by the carbonates and forms a plug.
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