Clay stabilizer
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United States of America Patent
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Aug 30, 1994
Issued Date -
N/A
app pub date -
May 4, 1992
filing date -
Feb 25, 1991
priority date (Note) -
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Abstract
A composition suitable as an additive in down-hole fluid for inhibiting clay swelling in a down-hole formation is comprised of an aqueous solution of a quaternary amine-based cationic polyelectrolyte and salt(s). The cation of the salt(s) may be a divalent salt cation, a choline cation, are certain N-substituted quaternary ammonium salt cations. The salt(s) anion may be a monovalent inorganic anion or an anion derived from an organic acid having from 2 to 6 carbons.
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