Cementing multi-lateral wells
AssigneeHalliburton Company
InventorsJan P. Vijn, Zacharias Xenakis, Daniel L. Bour, Jerry D. Childs
Life of this patent
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Abstract
The present invention provides methods of cementing the junction of multi-lateral wells whereby the set cement can withstand impacts and shocks without shattering. A cement slurry composition which sets into a high strength impact resistant solid mass is utilized comprised of a styrene/butadiene aqueous latex, a latex stabilizer, hydraulic cement and appropriate cementing additives.
Claims20
A method of cementing conduits in a multi-lateral subterranean well whereby the set cement can withstand impacts and shocks subsequently generated by drilling and other well operations without shattering, comprising the steps of:
- (a) introducing a cement slurry composition which sets into a high strength impact resistant solid mass between said conduits and the walls of said well, said cement slurry composition comprising
- a styrene/butadiene aqueous latex,
- an effective amount of a latex stabilizer selected from the group consisting of surfactants having the formula ##STR6## wherein R is an alkyl group having from 5 to 30 carbon atoms, Ph is phenylene and m is an integer in the range of from about 5 to about 50, and surfactants of the general formula ##STR7## wherein R.sub.1 is selected from table group consisting of C.sub.1 -C.sub.30 alkyl groups, C.sub.5 -C.sub.6 cycloalkyl groups, C.sub.1 -C.sub.4 alkyl substituted C.sub.5 -C.sub.6 cycloalkyl groups, phenyl, alkyl substituted phenyl of the general formula (R.sub.3).sub.a Ph--where Ph is phenylene, R.sub.3 is a C.sub.1 -C.sub.18 alkyl group and a is an integer of from 1 to 3, and phenyl (C.sub.1 -C.sub.18) alkyl groups having a total of from about 8 to about 28 carbon atoms, R.sub.2 is a substituted ethylene group of the formula --CH.sub.2 CH R.sub.4 wherein R.sub.4 is selected from hydrogen, methyl, ethyl or mixtures thereof, and n is a number from 0 to about 40 provided that when R.sub.1 is phenyl or alkyl substituted phenyl, n is at least 1 and X is any compatible cation, and
- hydraulic cement;
- and
- (b) allowing said cement slurry composition to set in said well.
A method of cementing casing and liners in a multilateral subterranean well whereby the set cement can withstand the impacts and shocks subsequently generated by drilling and other well operations without shattering comprising the steps of:
- (a) introducing a cement slurry composition which sets into a high strength impact resistant solid mass between said casing and liners and the walls of said well, said cement slurry composition comprising
- a styrene/butadiene aqueous latex containing water in an amount of about 50% by weight of said latex and the weight ratio of styrene to butadiene in said latex being in the range of from about 10%:90% to about 90%:10%,
- a latex stabilizer selected from the group consisting of surfactants having the formula ##STR10## wherein R is an alkyl group having from 5 to 30 carbon atoms, Ph is phenylene and m is an integer in the range of from about 5 to about 50, and surfactants of the general formula ##STR11## wherein R.sub.1 is selected from the group consisting of C.sub.1 -C.sub.30 alkyl groups, C.sub.5 -C.sub.6 cycloalkyl groups, C.sub.1 -C.sub.4 alkyl substituted C.sub.5 -C.sub.6 cycloalkyl groups, phenyl, alkyl substituted phenyl of the general formula (R.sub.3).sub.a Ph--where Ph is phenylene, R.sub.3 is a C.sub.1 -C.sub.18 alkyl group and a is an integer of from 1 to 3, and phenyl (C.sub.1 -C.sub.18) alkyl groups having a total of from about 8 to about 28 carbon atoms, R.sub.2 is a substituted ethylene group of the formula --CH.sub.2 CH R.sub.4 wherein R.sub.4 is selected from hydrogen, methyl, ethyl or mixtures thereof, and n is a number from 0 to about 40 provided that when R.sub.1 is phenyl or alkyl substituted phenyl, n is at least 1 and X is any compatible cation, and
- hydraulic cement present in said composition in an amount in the range of from about 111% to about 285% by weight of said styrene/butadiene aqueous latex;
- and
- (b) allowing said cement slurry composition to set in said well.
A method of cementing casing and liners in a multilateral subterranean well whereby the set cement can withstand the impacts and shocks subsequently generated by drilling and other well operations without shattering comprising the steps of:
- (a) introducing a cement slurry composition which sets into a high strength impact resistant solid mass between said casing and liners and the walls of said well, said cement slurry composition comprising
- a styrene/butadiene aqueous latex containing water in an amount of about 50% by weight of said latex and the weight ratio of styrene to butadiene in said latex being about 25%:75%,
- a latex stabilizer selected from the group consisting of nonylphenol ethoxylated with in the range of from about 20 to about 30 moles of ethylene oxide and sodium C.sub.12-15 pareth-15 sulfonate present in said composition in an amount in the range of from about 5% to about 30% by weight of said styrene/butadiene aqueous latex, and
- Portland Class G hydraulic cement present in said composition in an amount in the range of from about 111% to about 285% by weight of said styrene/butadiene aqueous latex;
- and
- (b) allowing said cement slurry composition to set in said well.
Dependencies are inferred from the claim text.