# US 7,607,483 B2 · Sealant compositions comprising colloidally stabilized latex and methods of using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,483 B2 - Document ID: US7607483B2 - Status: Granted - Kind: B2 - Application number: 10/827,022 - Filed: 2004-04-19 - Published: 2005-10-20 - Granted: 2009-10-27 - Earliest claimed: 2004-04-19 - Assignees: Halliburton Energy Services, Inc. - Inventors: B. Raghava Reddy; Anthony V. Palmer - Web page: https://patentgrep.com/patent/US7607483B2 ## CPC - C09K 8/506: containing organic compounds - C09K 8/5083: {obtained by reactions only involving carbon-to-carbon unsaturated bonds} - C09K 8/5086: {obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds} - C09K 8/514: of natural origin, e.g. polysaccharides, cellulose (C09K8/512 takes precedence) - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract Sealant compositions comprising a colloidally stabilized latex and methods of using the same to service a wellbore are provided. The sealant compositions may include: an aliphatic conjugated diene monomer; an additional monomer comprising a non-aromatic unsaturated mono- or di-carboxylic ester monomer, an aromatic unsaturated monomer, a nitrogen-containing monomer, or combinations thereof; and a protective colloid. The foregoing sealant composition may be displaced into the wellbore to isolate the subterranean formation from a portion of the wellbore, to support a conduit in the wellbore, to plug a void or crack in the conduit, to plug a void or crack in a cement sheath disposed in an annulus of the wellbore, to plug an opening between the cement sheath and the conduit, or combinations thereof. The colloidally stabilized latex remains substantially stable when exposed to salt, which may be present in the wellbore and/or in the sealant composition itself. ## Claims ### Claim 1 A method of servicing a wellbore in contact with a subterranean formation, comprising: placing a sealant composition comprising a colloidally stabilized latex into the wellbore and contacting the sealant composition with salt as it passes through the wellbore, wherein the collodially stabilized latex comprises a protective colloid comprising polyvinylalcohol, a cellulose ether, a natural gum, a synthetic gum, polyacrylic acid, an acrylate, a poly(vinyl alcohol)co(vinyl amine) copolymer, or combinations thereof and does not precipitate in a solution of at least 25 weight percent salt. ### Claim 2 (depends on 1) The method of claim 1, wherein the colloidally stabilized latex comprises: (a) an aliphatic conjugated diene monomer; and (b) an additional monomer comprising a non-aromatic unsaturated mono- or di-carboxylic ester monomer, an aromatic unsaturated monomer, a nitrogen-containing monomer, or combinations thereof. ### Claim 3 (depends on 2) The method of claim 2, wherein the colloidally stabilized latex comprises a functionalized silane generally represented by: wherein R″ is a C1 to C5 alkyl, R′ is a C1 to C5 alkyl, R is SH, CH2═CH—, CH2═C(CH3)—C(O)O—, CH2═CH—C(O)O—, or n is in a range of from 1 to 10, and m is 2 or 3. ### Claim 4 (depends on 3) The method of claim 3, wherein the sealant composition comprises cement. ### Claim 5 (depends on 3) The method of claim 3, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 6 (depends on 2) The method of claim 2, wherein the colloidally stabilized latex comprises a surfactant having ethylenic unsaturation that copolymerizes with the aliphatic conjugated diene monomer and the additional monomer, thereby forming a polymer having the surfactant in its backbone. ### Claim 7 (depends on 2) The method of claim 2, wherein the sealant composition comprises cement. ### Claim 8 (depends on 2) The method of claim 2, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 9 (depends on 1) The method of claim 1, wherein the colloidally stabilized latex comprises an oxyalkylene functional monomer comprising a monoester of mono- or di-carboxylic acid, a diester of dicarboxylic acid, or combinations thereof, wherein R is hydrogen or a C1-C4 alkyl, R′ is hydrogen or a C1-C4 alkyl, R″ is hydrogen or a C1-C4 alkyl, and n is in a range of from 1 to 30, and wherein the oxyalkylene functional monomer copolymerizes with the aliphatic conjugated diene monomer and the additional monomer. ### Claim 10 (depends on 9) The method of claim 9, wherein the sealant composition comprises cement. ### Claim 11 (depends on 9) The method of claim 9, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 12 (depends on 1) The method of claim 1, wherein the salt comprises a monovalent ion, a divalent ion, or combinations thereof. ### Claim 13 (depends on 12) The method of claim 12, wherein the sealant composition is displaced into an annulus of the wellbore and allowed to set. ### Claim 14 (depends on 12) The method of claim 12, wherein the sealant composition comprises cement. ### Claim 15 (depends on 12) The method of claim 12, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 16 (depends on 1) The method of claim 1, wherein the sealant composition comprises fibers, beads, or combinations thereof. ### Claim 17 (depends on 16) The method of claim 16, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 18 (depends on 1) The method of claim 1, wherein the sealant composition comprises a cement slurry. ### Claim 19 (depends on 1) The method of claim 1, wherein the sealant composition is positioned in the wellbore to isolate the subterranean formation from a portion of the wellbore, to support a conduit in the wellbore, to plug a void or crack in the conduit, to plug a void or crack in a cement sheath disposed in an annulus of the wellbore, to plug an opening between the cement sheath and the conduit, or combinations thereof. ### Claim 20 (depends on 1) The method of claim 1, wherein the colloidally stabilized latex comprises a vulcanizable group, a vulcanizing agent, a vulcanization accelerator, a vulcanization retarder, or combinations thereof. ### Claim 21 (depends on 20) The method of claim 20, wherein the sealant composition comprises cement. ### Claim 22 (depends on 20) The method of claim 20, wherein the sealant composition comprises fibers, beads or combinations. ### Claim 23 (depends on 1) The method of claim 1, wherein the colloidally stabilized latex comprises a crosslinkable monomer, an acidic catalyst, a thermosetting resin, or combinations thereof. ### Claim 24 (depends on 23) The method of claim 23, wherein the sealant composition comprises cement. ### Claim 25 (depends on 23) The method of claim 23, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 26 (depends on 1) The method of claim 1, further comprising combining a drilling fluid with the sealant composition near a loss-circulation zone, thereby forming a solid mass in the loss-circulation zone. ### Claim 27 (depends on 26) The method of claim 26, wherein the sealant composition comprises cement. ### Claim 28 (depends on 26) The method of claim 26, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 29 (depends on 1) The method of claim 1, wherein the sealant composition comprises cement. ### Claim 30 (depends on 1) The method of claim 1, wherein the sealant composition comprises fibers, beads, or combinations. ### Claim 31 (depends on 1) The method of claim 1, wherein the wellbore service comprises primary cementing in the wellbore. ### Claim 32 (depends on 1) The method of claim 1, wherein the wellbore service comprises secondary cementing in the wellbore. ### Claim 33 (depends on 1) The method of claim 1, wherein the wellbore service comprises remediating lost circulation while drilling.