Scale inhibitor
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United States of America Patent
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Sep 2, 2014
Grant Date -
Jan 24, 2013
app pub date -
Mar 24, 2011
filing date -
Apr 1, 2010
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Abstract
This invention relates to a process for inhibiting scaling in a subterranean oil or gas producing formation, comprising adding to the formation a composition comprising a metal chelant, a scale inhibitor and divalent metal cations, wherein the stability constant of the metal chelant-metal cation chelate at ambient temperature is equal to or higher than the stability constant of the chelate formed from the metal cations and the scale inhibitor, and wherein the solubility of the chelate formed from the metal cations and the scale inhibitor decreases with increasing temperature.
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