Sealing subterranean zones
AssigneeHalliburton Energy Services, Inc.
InventorsJiten Chatterji, Roger S. Cromwell, Bobby J. King
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Abstract
The present invention provides improved compositions and methods of using the compositions for sealing subterranean zones. The compositions are basically comprised of water, an aqueous rubber latex, an organophillic clay, sodium carbonate, an epoxy resin and a hardening agent for said epoxy resin.
Claims10
An improved composition for sealing a subterranean zone penetrated by a well bore comprising water, about 8-17% by weight of an aqueous rubber latex, about 13-22% by weight of an organophillic clay, about 2.7-4.4% by weight of sodium carbonate, about 30-60% by weight of an epoxy resin, about 10-20% by weight of a hardening agent for said epoxy resin.
A composition for sealing a subterranean zone penetrated by a well bore comprising:
- water present in an amount of from about 30% to about 42% by weight of said composition;
- an aqueous 25%:75% by weight styrene/butadiene latex which contains water in an amount of about 50% by weight of the latex present in an amount in the range of from about 10% to about 12% by weight of said composition;
- a latex stabilizer comprised of the sodium salt of a sulfonated and ethoxylated compound having the formula H(CH2)12-15(CH2CH2O)15SO3Na present in an amount in the range of from about 3% to about 6% by weight of said composition;
- an alkyl quaternary ammonium bentonite clay present in an amount in the range of from about 16% to about 19% by weight of said composition;
- sodium carbonate present in an amount in the range of from about 3.3% to about 3.7% by weight of said composition;
- an epoxy resin comprised of a condensation product of epichlorohydrin and bisphenol A present in an amount in the range of from about 30% to about 60% by weight of said composition;
- an epoxy resin hardening agent comprised of an aliphatic or aromatic amine present in an amount in the range of from about 10% to about 20% by weight of said composition;
- welan gum biopolymer present in an amount in the range of from about 0.1% to about 0.2% by weight of said composition;
- a dispersing agent comprised of the condensation reaction product of acetone, formaldehyde and sodium sulfite present in an amount in the range of from about 0.4% to about 0.47% by weight of said composition;
- and
- a defoaming agent comprised of polymethylsiloxane present in an amount in the range of from about 0.8% to about 1.2% by weight of said composition.
Dependencies are inferred from the claim text.