# US 2006/0234870 A1 · Methods and compositions for delaying the release of treatment chemicals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2006/0234870 A1 - Document ID: US20060234870A1 - Status: Published application - Kind: A1 - Application number: 11/107,427 - Filed: 2005-04-15 - Published: 2006-10-19 - Earliest claimed: 2005-04-15 - Assignees: Halliburton Energy Services, Inc. - Inventors: Michael McCabe; Jim Weaver; Robert Hanes; Billy Slabaugh - Web page: https://patentgrep.com/patent/US20060234870A1 ## CPC - C09K 8/536: characterised by their form or by the form of their components, e.g. encapsulated material - C09K 8/54: Compositions for in situ inhibition of corrosion in boreholes or wells - C09K 8/70: characterised by their form or by the form of their components, e.g. foams - C09K 8/703: {Foams} - C09K 8/706: {Encapsulated breakers} - C09K 8/92: characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence) - C09K 8/94: Foams - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A method comprising: providing at least one encaged treatment chemical that comprises a treatment chemical and a polymer carrier; placing the encaged treatment chemical into a portion of a subterranean formation; and allowing the treatment chemical to diffuse out of the encaged treatment chemical and into a portion of the subterranean formation or an area adjacent thereto. ## Claims ### Claim 1 A method comprising: providing at least one encaged treatment chemical that comprises a treatment chemical and a polymer carrier; placing the encaged treatment chemical into a portion of a subterranean formation; and allowing the treatment chemical to diffuse out of the encaged treatment chemical and into the subterranean formation or an area adjacent thereto. ### Claim 2 (depends on 1) The method of claim 1 wherein the treatment chemical comprises at least one of the following: a chelating agent; a scale inhibitor; a gel breaker; a dispersant; a paraffin inhibitor; a wax inhibitor; a corrosion inhibitor; a de-emulsifier; a foaming agent; a tracer; a defoamer; a delinker; a scale inhibitor; a crosslinker; a surfactant; derivatives and/or combinations thereof. ### Claim 3 (depends on 1) The method of claim 1 wherein the encaged treatment chemical is formed by polymerizing a monomer in the presence of the treatment chemical using at least one of the following types of polymerization reactions: free radical polymerization, condensation polymerization, vinyl polymerization, or emulsion polymerization. ### Claim 4 (depends on 1) The method of claim 1 wherein the monomer comprises at least one of the following: acrylamide; styrene; butadiene; methacrylate; N-isopropyl acrylamide; N,N-dimethyl acrylamide; methacrylamide; methylacrylate; a cationic monomer; or a anionic monomer. ### Claim 5 (depends on 2) The method of claim 2 further comprising crosslinking the polymerized monomer using a crosslinking agent. ### Claim 6 (depends on 1) The method of claim 1 wherein the encaged treatment chemical is formed by crosslinking a polymer in the presence of the treatment chemical with a reaction comprising a crosslinking agent. ### Claim 7 (depends on 6) The method of claim 6 wherein the crosslinking agent comprises at least one of the following: N,N′-methylenebisacrylamide, boric acid, disodium octaborate tetrahydrate, sodium diborate, a pentaborate, ulexite, colemanite, a compound that can supply zirconium IV ions, a compound that can supply titanium IV ions, an aluminum compound, an antimony compound; a chromium compound; an iron compound; a copper compound; or a zinc compound. ### Claim 8 (depends on 6) The method of claim 6 wherein the polymer being crosslinked comprises a hydratable polymer that comprises one or more of the following functional groups: hydroxyl, cis-hydroxyl, carboxylic acids, derivatives of carboxylic acids, sulfate, sulfonate, phosphate, phosphonate, amino, or amide. ### Claim 9 (depends on 1) The method of claim 1 wherein the encaged treatment chemical comprises a salt ### Claim 10 (depends on 9) The method of claim 9 wherein the salt comprises at least one of the following: potassium chloride, cesium chloride, or ammonium chloride. ### Claim 11 (depends on 1) The method of claim 1 wherein the encaged treatment chemical comprises a caustic agent. ### Claim 12 (depends on 1) The method of claim 1 further comprising dehydrating the encaged treatment chemical before placing the encaged treatment chemical into a portion of a subterranean formation. ### Claim 13 (depends on 12) The method of claim 12 further comprising grinding the dehydrated encaged treatment chemical polymer carrier to a desired particle size before placing the encaged treatment chemical into a portion of a subterranean formation. ### Claim 14 An encaged treatment chemical for use in a subterranean application comprising a subterranean treatment chemical and a polymer carrier. ### Claim 15 (depends on 14) The encaged treatment chemical of claim 14 wherein the treatment chemical comprises at least one of the following: a chelating agent; a scale inhibitor; a gel breaker; a dispersant; a paraffin inhibitor; a wax inhibitor; a corrosion inhibitor; a de-emulsifier; a foaming agent; a tracer; a defoamer; a delinker; a scale inhibitor; a crosslinker; a surfactant; derivatives and/or combinations thereof. ### Claim 16 (depends on 14) The encaged treatment chemical of claim 14 wherein the encaged treatment chemical is formed by polymerizing a monomer in the presence of the treatment chemical using at least one of the following types of polymerization reactions: free radical polymerization, condensation polymerization, vinyl polymerization, or emulsion polymerization. ### Claim 17 (depends on 14) The encaged treatment chemical of claim 14 wherein the treatment chemical is impregnated into the polymer carrier. ### Claim 18 (depends on 16) The encaged treatment chemical of claim 16 wherein the monomer comprises at least one of the following: acrylamide; styrene; butadiene; methacrylate; N-isopropyl acrylamide; N,N-dimethyl acrylamide; methacrylamide; methylacrylate; a cationic monomer; or a anionic monomer. ### Claim 19 (depends on 14) The encaged treatment chemical of claim 14 wherein the encaged treatment chemical is substantially dehydrated and/or ground. ### Claim 20 (depends on 14) The encaged treatment chemical of claim 14 wherein the encaged treatment chemical is substantially hydrated.