# US 2014/0194326 A1 · Compositions and Methods for Treatment of Well Bore Tar > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194326 A1 - Document ID: US20140194326A1 - Status: Published application - Kind: A1 - Application number: 14/203,030 - Filed: 2014-03-10 - Published: 2014-07-10 - Earliest claimed: 2011-12-16 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: Philip Wayne Livanec; Gregory Paul Perez - Web page: https://patentgrep.com/patent/US20140194326A1 ## CPC - C09K 8/524: organic depositions, e.g. paraffins or asphaltenes - C09K 8/04: Aqueous well-drilling compositions - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract Of the many compositions and methods provided herein, one method includes contacting tar resident in a well bore with a tar stabilizer comprising an acrylonitrile-butadiene copolymer; and allowing the tar stabilizer to interact with the tar to at least partially reduce the tendency of the tar to adhere to a surface. ## Claims ### Claim 1 A well bore treatment fluid comprising: an aqueous fluid; and an acrylonitrile-butadiene copolymer. ### Claim 2 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer is carboxylated. ### Claim 3 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer further comprises a styrene. ### Claim 4 (depends on 3) The fluid of claim 3, wherein the acrylonitrile-butadiene copolymer comprises an additional monomer in an amount of less than about 1% by weight. ### Claim 5 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer comprises acrylonitrile in an amount of about 50% to about 95% by weight of the copolymer, butadiene in an amount of about 5% to about 50% by weight of the copolymer, and styrene in an amount up to about 25% by weight of the copolymer. ### Claim 6 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer is an emulsion-polymerized acrylonitrile-butadiene copolymer. ### Claim 7 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer comprises a copolymer of acrylonitrile and butadiene, wherein the acrylonitrile is substituted with at least one group selected from the group consisting of a chloro group, a bromo group, a fluoro group, an akyl group, an alkoxy group, an alkenyl group, an alkynyl group, and an aryl group. ### Claim 8 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer comprises a copolymer of acrylonitrile and butadiene, wherein the butadiene is substituted with at least one group selected from the group consisting of a chloro group, a bromo group, a fluoro group, an akyl group, an alkoxy group, an alkenyl group, an alkynyl group, and an aryl group. ### Claim 9 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer is anionic. ### Claim 10 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer is present in the treatment fluid in an amount of about 1% to about 70% by volume of the treatment fluid. ### Claim 11 (depends on 1) The fluid of claim 1, wherein the acrylonitrile-butadiene copolymer is present in the treatment fluid in an amount of about 1% to about 10% by volume of the treatment fluid. ### Claim 12 (depends on 1) The fluid of claim 1, wherein the treatment fluid further comprises a viscosifier selected from the group consisting of a colloidal agent, a clay, a polymer, guar gum, an emulsion-forming agent, diatomaceous earth, a biopolymer, a synthetic polymer, chitosan, a starch, a gelatin, and any mixture thereof. ### Claim 13 (depends on 1) The fluid of claim 1, wherein the treatment fluid further comprises at least one additive selected from the group consisting of a salt, a surfactant, a fluid-loss-control additive, a gas, nitrogen, carbon dioxide, a surface-modifying agent, a tackifying agent, a foamer, a corrosion inhibitor, a scale inhibitor, a catalyst, a clay-control agent, a biocide, a friction reducer, an antifoam agent, a bridging agent, a dispersant, a flocculant, hydrogen sulfide scavenger, carbon dioxide scavenger, an oxygen scavenger, a lubricant, a viscosifier, a breaker, a weighting agent, barite, a relative-permeability modifier, a resin, a particulate material, a proppant particulate, a wetting agent, a coating-enhancement agent, and any combination thereof. ### Claim 14 (depends on 1) The fluid of claim 1, wherein the treatment fluid further comprises well bore tar that is not emulsified, wherein the acrylonitrile-butadiene copolymer coats or encapsulates the well bore tar such that the well bore tar is less tacky. ### Claim 15 A well bore treatment fluid comprising: an aqueous fluid; and an emulsion-polymerized carboxylated acrylonitrile-butadiene copolymer in an amount of about 1% to about 10% by volume of the treatment fluid. ### Claim 16 (depends on 15) The fluid of claim 15, wherein the emulsion-polymerized carboxylated acrylonitrile-butadiene copolymer further comprises a styrene. ### Claim 17 (depends on 15) The fluid of claim 15, wherein the emulsion-polymerized carboxylated acrylonitrile-butadiene copolymer comprises acrylonitrile in an amount of about 50% to about 95% by weight of the copolymer, butadiene in an amount of about 5% to about 50% by weight of the copolymer, and styrene in an amount up to about 25% by weight of the copolymer. ### Claim 18 (depends on 15) The fluid of claim 15, wherein the acrylonitrile-butadiene copolymer is anionic. ### Claim 19 (depends on 15) The fluid of claim 15, wherein the treatment fluid further comprises a viscosifier selected from the group consisting of a colloidal agent, a clay, a polymer, guar gum, an emulsion-forming agent, diatomaceous earth, a biopolymer, a synthetic polymer, chitosan, a starch, a gelatin, and any mixture thereof. ### Claim 20 (depends on 15) The fluid of claim 15, wherein the treatment fluid further comprises at least one additive selected from the group consisting of a salt, a surfactant, a fluid-loss-control additive, a gas, nitrogen, carbon dioxide, a surface-modifying agent, a tackifying agent, a foamer, a corrosion inhibitor, a scale inhibitor, a catalyst, a clay-control agent, a biocide, a friction reducer, an antifoam agent, a bridging agent, a dispersant, a flocculant, hydrogen sulfide scavenger, carbon dioxide scavenger, an oxygen scavenger, a lubricant, a viscosifier, a breaker, a weighting agent, barite, a relative-permeability modifier, a resin, a particulate material, a proppant particulate, a wetting agent, a coating-enhancement agent, and any combination thereof.