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公开(公告)号：US20230067381A1
公开(公告)日：2023-03-02
申请号：US17938345
申请日：2022-10-06
摘要： A method of inhibiting corrosion of metal during acid stimulation of an oil and gas well, whereby the oil and gas well is treated with an acidic treatment fluid containing 10 to 28 wt. % of an acid and 0.001 to 0.045 wt. % of a corrosion inhibitor of formula I, each based on a total weight of the acidic treatment fluid, wherein R1 to R5 are independently hydrogen, an optionally substituted alkyl, an optionally substituted aryl, an optionally substituted alkoxy, an optionally substituted alkanoyloxy, a carboxy, an optionally substituted alkoxycarbonyl, a hydroxy, a halo, a nitro, a cyano, or wherein two of these adjacent substituents represented by R1 to R5, together form a methylene dioxy group.
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公开(公告)号：US20200318243A1
公开(公告)日：2020-10-08
申请号：US16376819
申请日：2019-04-05
IPC分类号： C23F11/16 , C07D487/04
摘要： Heterocyclic compounds having fused pyrimidine moieties with electron-donating groups. A method of preparing the heterocyclic compounds via a multicomponent condensation reaction is specified. These compounds are effective against corrosion of metallic substrates in acidic (i.e. CO2), and high salinity environments commonly found in oil and gas industry.
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公开(公告)号：US20200369951A1
公开(公告)日：2020-11-26
申请号：US16418585
申请日：2019-05-21
摘要： A method of inhibiting corrosion of metal during acid stimulation of an oil and gas well, whereby the oil and gas well is treated with an acidic treatment fluid containing 10 to 28 wt. % of an acid and 0.001 to 0.045 wt. % of a corrosion inhibitor of formula I, each based on a total weight of the acidic treatment fluid, wherein R1 to R5 are independently hydrogen, an optionally substituted alkyl, an optionally substituted aryl, an optionally substituted alkoxy, an optionally substituted alkanoyloxy, a carboxy, an optionally substituted alkoxycarbonyl, a hydroxy, a halo, a nitro, a cyano, or wherein two of these adjacent substituents represented by R1 to R5, together form a methylene dioxy group.
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公开(公告)号：US20230048387A1
公开(公告)日：2023-02-16
申请号：US17938340
申请日：2022-10-06
摘要： A method of inhibiting corrosion of metal during acid stimulation of an oil and gas well, whereby the oil and gas well is treated with an acidic treatment fluid containing 10 to 28 wt. % of an acid and 0.001 to 0.045 wt. % of a corrosion inhibitor of formula I, each based on a total weight of the acidic treatment fluid, wherein R1 to R5 are independently hydrogen, an optionally substituted alkyl, an optionally substituted aryl, an optionally substituted alkoxy, an optionally substituted alkanoyloxy, a carboxy, an optionally substituted alkoxycarbonyl, a hydroxy, a halo, a nitro, a cyano, or wherein two of these adjacent substituents represented by R1 to R5, together form a methylene dioxy group.
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