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公开(公告)号：US11912938B2
公开(公告)日：2024-02-27
申请号：US18322668
申请日：2023-05-24
IPC分类号： C09K8/80
CPC分类号： C09K8/805 , C09K2208/10
摘要： Coated proppants include a proppant particle, a surface copolymer layer surrounding the proppant particle, and a resin layer surrounding the surface copolymer layer. The surface copolymer layer includes a copolymer of at least two monomers chosen from styrene, methyl methacrylate, ethylene, propylene, butylene, imides, urethanes, sulfones, carbonates, and acrylamides, where the copolymer is crosslinked by divinyl benzene. The resin layer includes a cured resin. Methods of preparing the coated proppants include preparing a first mixture including at least one polymerizable material, an initiator, and a crosslinker including divinyl benzene; contacting the first mixture to a proppant particle to form a polymerization mixture; heating the polymerization mixture to cure the polymerizable material and form a polymer-coated particulate; preparing a second mixture including the polymer-coated substrate, an uncured resin, and a solvent; and adding a curing agent to the second mixture to cure the uncured resin and form the coated proppant.
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公开(公告)号：US20230313027A1
公开(公告)日：2023-10-05
申请号：US18322668
申请日：2023-05-24
IPC分类号： C09K8/80
CPC分类号： C09K8/805 , C09K2208/10
摘要： Coated proppants include a proppant particle, a surface copolymer layer surrounding the proppant particle, and a resin layer surrounding the surface copolymer layer. The surface copolymer layer includes a copolymer of at least two monomers chosen from styrene, methyl methacrylate, ethylene, propylene, butylene, imides, urethanes, sulfones, carbonates, and acrylamides, where the copolymer is crosslinked by divinyl benzene. The resin layer includes a cured resin. Methods of preparing the coated proppants include preparing a first mixture including at least one polymerizable material, an initiator, and a crosslinker including divinyl benzene; contacting the first mixture to a proppant particle to form a polymerization mixture; heating the polymerization mixture to cure the polymerizable material and form a polymer-coated particulate; preparing a second mixture including the polymer-coated substrate, an uncured resin, and a solvent; and adding a curing agent to the second mixture to cure the uncured resin and form the coated proppant.
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公开(公告)号：US11384283B2
公开(公告)日：2022-07-12
申请号：US16553328
申请日：2019-08-28
摘要： Coated particles include a particulate substrate, a surface copolymer layer surrounding the particulate substrate, and a resin layer surrounding the surface copolymer layer. The surface copolymer layer includes a copolymer of at least two monomers chosen from styrene, methyl methacrylate, ethylene, propylene, butylene, imides, urethanes, sulfones, carbonates, and acrylamides. The resin layer includes a cured resin. Methods of preparing the coated particles include preparing a first mixture including at least one polymerizable material, an initiator, and optionally a solvent; contacting the first mixture to a particulate substrate to form a polymerization mixture; heating the polymerization mixture to cure the polymerizable material and form a polymer-coated particulate; preparing a second mixture including the polymer-coated substrate, an uncured resin, and a solvent; and adding a curing agent to the second mixture to cure the uncured resin and form the coated particle.
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公开(公告)号：US20210395603A1
公开(公告)日：2021-12-23
申请号：US16905175
申请日：2020-06-18
摘要： A coated proppant having a proppant particle, an intermediate cross-linked terpolymer layer encapsulating the proppant particle, and an outer resin layer encapsulating the intermediate cross-linked terpolymer layer. The proppant particle is selected from sand, ceramic, glass, and combinations thereof. The intermediate cross-linked terpolymer layer includes styrene, methyl methacrylate, and divinyl benzene. The outer resin layer includes a cured epoxy resin formed from an epoxy resin and a curing agent.
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公开(公告)号：US20210324257A1
公开(公告)日：2021-10-21
申请号：US16854323
申请日：2020-04-21
摘要： A polymer composite hydrogel includes a polymer composite, water, an organic crosslinker, and a salt. The polymer composite includes a nanosheet filler dispersed throughout a polymerized polyacrylamide. The nanosheet filler includes one or more of zirconium hydroxide, zirconium oxide, titanium oxide, graphene oxide, non-functionalized graphene, and hexagonal boron nitride. Further, a weight ratio of the nanosheet filler to the polymerized polyacrylamide is between 1:99 and 1:9. The polymer composite hydrogel includes 0.5 to 6 weight percent of the polymer composite and 0.25 to 5 weight percent of the salt, the salt being a monovalent salt, a divalent salt, or a combination of monovalent and divalent salts. A method of preparing a polymer composite, a method of preparing a polymer composite hydrogel for water shutoff applications, and the associated method of forming a barrier to shut off or reduce unwanted production of water in a subterranean formation is also provided.
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公开(公告)号：US11851614B2
公开(公告)日：2023-12-26
申请号：US16905175
申请日：2020-06-18
CPC分类号： C09K8/805 , C08F12/08 , C08F20/06 , C08G59/5006 , C08G59/5033 , C08K3/042 , C08K5/03
摘要： A coated proppant having a proppant particle, an intermediate cross-linked terpolymer layer encapsulating the proppant particle, and an outer resin layer encapsulating the intermediate cross-linked terpolymer layer. The proppant particle is selected from sand, ceramic, glass, and combinations thereof. The intermediate cross-linked terpolymer layer includes styrene, methyl methacrylate, and divinyl benzene. The outer resin layer includes a cured epoxy resin formed from an epoxy resin and a curing agent.
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公开(公告)号：US11459503B2
公开(公告)日：2022-10-04
申请号：US16905225
申请日：2020-06-18
摘要： A method for producing a coated proppant having an intermediate cross-linked terpolymer layer includes mixing a monomers solution including a first monomer, a second monomer that is different from the first monomer, a cross-linking agent, and an initiator. The proppant particle is combined with the monomers solution, and the monomer solution on the surface of the at least one proppant particle is polymerized to form at least one proppant particle having the intermediate cross-linked terpolymer layer on a surface of the at least one proppant particle. A resin solution including an epoxy resin, a curing agent, and graphene is mixed, and combined with the at least one proppant particle having the intermediate cross-linked terpolymer layer on a surface of the at least one proppant particle. The resin solution is cured to form the coated proppant comprising an intermediate cross-linked terpolymer layer.
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公开(公告)号：US11421141B2
公开(公告)日：2022-08-23
申请号：US16854323
申请日：2020-04-21
摘要： A polymer composite hydrogel includes a polymer composite, water, an organic crosslinker, and a salt. The polymer composite includes a nanosheet filler dispersed throughout a polymerized polyacrylamide. The nanosheet filler includes one or more of zirconium hydroxide, zirconium oxide, titanium oxide, graphene oxide, non-functionalized graphene, and hexagonal boron nitride. Further, a weight ratio of the nanosheet filler to the polymerized polyacrylamide is between 1:99 and 1:9. The polymer composite hydrogel includes 0.5 to 6 weight percent of the polymer composite and 0.25 to 5 weight percent of the salt, the salt being a monovalent salt, a divalent salt, or a combination of monovalent and divalent salts. A method of preparing a polymer composite, a method of preparing a polymer composite hydrogel for water shutoff applications, and the associated method of forming a barrier to shut off or reduce unwanted production of water in a subterranean formation is also provided.
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公开(公告)号：US11306159B2
公开(公告)日：2022-04-19
申请号：US16854299
申请日：2020-04-21
IPC分类号： C08F2/22 , C08F2/44 , C08K3/38 , C08K3/04 , C08K3/22 , C08K3/30 , C08F6/14 , C08J3/12 , C08F20/56 , C09K8/508 , C09K8/512 , C09K8/516 , C08K5/1535 , C08J3/075 , B82Y30/00
摘要： A method of preparing a polymer composite includes dispersing a nanosheet filler within a polymer matrix by dissolving a monomer in water to form a first solution, dispersing the nanosheet filler in an organic solvent in the presence of an emulsifying agent to form a second solution, combining the first solution and the second solution, and adding a polymerization initiator to initiate a polymerization reaction of the monomer to form a polymer composite precursor comprising the nanosheet filler dispersed in the polymer matrix. The method further includes quenching the polymerization reaction and then filtering, washing, grinding, and drying the polymer composite precursor to form the polymer composite. A method of preparing a polymer composite hydrogel for water shutoff applications and the associated method of forming a barrier to shut off or reduce unwanted production of water in a subterranean formation utilizing the polymer composite hydrogel is also provided.
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公开(公告)号：US20220112777A1
公开(公告)日：2022-04-14
申请号：US17066840
申请日：2020-10-09
IPC分类号： E21B21/00 , C09K8/516 , C09K8/512 , C09K8/508 , C08J3/24 , C08K3/04 , C08K3/22 , B82Y30/00 , C08K9/04
摘要： A method of forming a barrier to overcome lost circulation in a subterranean formation. The method includes injecting; a polymer-sand nanocomposite into one or more lost circulation zones in the subterranean formation where the polymer-sand nanocomposite is formed from sand mixed with a polymer hydrogel. Further, the polymer hydrogel includes a hydrogel polymer, an organic cross-linker, and a salt. The sand additionally comprises a surface modification. The associated method of preparing a polymer-sand nanocomposite lost circulation material for utilization in forming the barrier is provided.
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