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    • 9. 发明授权
    • Low viscosity defoaming/antiforming formulations
    • 低粘度消泡/抗皱配方
    • US5045232A
    • 1991-09-03
    • US379304
    • 1989-07-12
    • Manilal S. Dahanayake
    • Manilal S. Dahanayake
    • B01D19/04C08J3/03C08K3/34C08K5/06C08L71/02
    • C08J3/03B01D19/04B01D19/0404C08K3/34C08K5/06C08L71/02C08J2333/12
    • The present invention relates to balanced liquid hydrophobic/hydrophilic liquid formulations comprising:(a) between about 10 and about 90% by weight of a block polymer having the formula ##STR1## or mixtures thereof; (b) between about 10 and about 90% by weight of trimethylol propane initiated polyalkylene oxide having the formula ##STR2## optionally in admixture with polypropylene glycol having the formula ##STR3## (c) between about 10 and about 90% by weight of an alcohol alkoxylate having the formula to provide a 100% composition and(d) between about 0.1 and about 10% by weight hydrophobic silica based on components (a)+(b)+(c). The invention also pertains to the use of the above mixture in foamed liquids or liquid susceptible to foaming.
    • 平衡液体疏水/亲水性液体制剂本发明涉及平衡液体疏水/亲水性液体制剂,其包含:(a)约10至约90重量%的具有式“IMAGE”或+ TR“的嵌段聚合物或其混合物; (b)约10至约90重量%的三羟甲基丙烷引发的具有式“IMAGE”的聚氧化烯,任选与式(c)的聚丙二醇混合约10-约90重量% 具有式“IMAGE”或“IMAGE”的醇烷氧基化物以提供基于组分(a)+(b)+(c))的100%组合物和(d)约0.1至约10重量%的疏水性二氧化硅。 本发明还涉及上述混合物在易发泡的发泡液体或液体中的用途。
    • 10. 发明授权
    • Methods and compositions for viscosifying heavy aqueous brines
    • 粘稠重水盐水的方法和组合物
    • US09062238B2
    • 2015-06-23
    • US12802368
    • 2010-06-04
    • Subramanian KesavanManilal S. DahanayakeGary Woodward
    • Subramanian KesavanManilal S. DahanayakeGary Woodward
    • C09K8/90C09K8/08C09K8/40C09K8/66C09K8/68
    • C09K8/08C09K8/40C09K8/665C09K8/68C09K8/90
    • A method for viscosifying brine systems utilized in oilfield applications comprising: a) preparing a heavy brine system comprising obtaining an aqueous brine system comprising a hydrated polysaccharide and at least one multivalent salt, wherein the density of the aqueous brine system is greater than about 10 pounds per gallon (ppg), and adding an effective amount of an alkaline agent, thereby increasing the viscosity of the brine system. Also disclosed are methods for viscosifying brine systems utilized in well servicing applications comprising obtaining an aqueous brine solution comprising at least one multivalent salt, wherein the density of the aqueous brine system is greater than about 10 pounds per gallon (ppg); adding a polysaccharide; adding an effective amount of an acid buffering agent to the brine system to lower the pH of the brine system, whereby the polysaccharide is capable of substantially hydrating into the brine system; and adding an effective amount of an alkaline agent, thereby substantially increasing the viscosity of the brine system.
    • 一种用于在油田应用中使用的盐水系统的增稠方法,包括:a)制备重盐水系统,其包括获得包含水合多糖和至少一种多价盐的含水盐水系统,其中所述含水盐水系统的密度大于约10磅 每加仑(ppg),并加入有效量的碱性试剂,从而提高盐水系统的粘度。 还公开了用于在井服务应用中使用的用于增稠盐水系统的方法,包括获得包含至少一种多价盐的盐水水溶液,其中所述含水盐水系统的密度大于约10磅/加仑(ppg); 加入多糖; 向盐水系统中加入有效量的酸缓冲剂以降低盐水系统的pH,由此多糖能够基本上水合进盐水系统; 并加入有效量的碱性试剂,从而显着提高盐水系统的粘度。