Method of inhibiting sulfate scale in aqueous systems using poly(amino
acids)
    1.
    发明授权
    Method of inhibiting sulfate scale in aqueous systems using poly(amino acids) 失效
    使用聚(氨基酸)在水系统中抑制硫酸盐垢的方法

    公开(公告)号:US5658464A

    公开(公告)日:1997-08-19

    申请号:US706142

    申请日:1996-09-20

    IPC分类号: C02F5/04 C02F5/12 C02F5/14

    CPC分类号: C02F5/086 C02F5/125

    摘要: The present invention provides a method for inhibiting the formation of metal sulfate scale in an aqueous system. Metal sulfate scale formation is inhibited by adding an effective amount of one or more poly(amino acids) and one or more inorganic phosphates to the aqueous system. The poly(amino acids) are a reaction product formed from at least one compound selected from amino acids, amic acids, ammonium salts of monoethylenically unsaturated dicarboxylic acids, and ammonium salts of hydroxypolycarboxylic acids. The present invention also provides a method of inhibiting the formation of metal sulfate scale by adding an effective amount of a poly(amino acid) which contains tyrosine, tryptophan, histidine, arginine or combinations thereof.

    摘要翻译: 本发明提供一种抑制在水性体系中形成金属硫酸盐垢的方法。 通过向水性体系中加入有效量的一种或多种聚(氨基酸)和一种或多种无机磷酸盐来抑制金属硫酸盐形成。 聚(氨基酸)是由选自氨基酸,酰胺酸,单烯键式不饱和二羧酸的铵盐和羟基多羧酸的铵盐中的至少一种化合物形成的反应产物。 本发明还提供了通过添加有效量的含有酪氨酸,色氨酸,组氨酸,精氨酸或其组合的聚(氨基酸)来抑制形成金属硫酸盐垢的方法。

    Method for metal sulfate scale control in harsh oilfield conditions
    2.
    发明授权
    Method for metal sulfate scale control in harsh oilfield conditions 失效
    苛刻油田条件下金属硫酸盐垢控制方法

    公开(公告)号:US5755972A

    公开(公告)日:1998-05-26

    申请号:US790868

    申请日:1997-02-03

    IPC分类号: C02F5/10 C02F5/12 C09K8/528

    CPC分类号: C02F5/10 C02F5/12 C09K8/528

    摘要: A method for inhibiting barium sulfate precipitation in low pH aqueous fluids of underground petroleum-bearing formations by adding to such systems an effective amount of low molecular weight water-soluble polymer containing 5-35 weight percent sulfonic acid monomer units and 65-95 weight percent carboxylic acid monomer units, is provided. Polymer compositions based on 10-15 weight percent 2-acrylamido-2-methyl-1-propanesulfonic acid, 15-65 weight percent acrylic acid and 25-70 weight percent maleic acid are particularly preferred for use at very low pH conditions, e.g., 5.5 or less in the presence of high sulfate ion and barium ion concentrations.

    摘要翻译: 一种通过向这种体系中加入有效量的含有5-35%(重量)磺酸单体单元和65-95%重量百分比的低分子量水溶性聚合物来抑制地下含油地层的低pH含水流体中的硫酸钡沉淀的方法 羧酸单体单元。 基于10-15重量%2-丙烯酰氨基-2-甲基-1-丙磺酸,15-65重量%丙烯酸和25-70重量%马来酸的聚合物组合物特别优选用于在非常低的pH条件下使用, 在高硫酸根离子和钡离子浓度的存在下为5.5以下。