PH sensitive graft copolymer
    6.
    发明授权
    PH sensitive graft copolymer 有权
    PH敏感接枝共聚物

    公开(公告)号:US08822605B2

    公开(公告)日:2014-09-02

    申请号:US13254630

    申请日:2010-03-05

    IPC分类号: C08F283/02 C08F283/01

    CPC分类号: C08F283/01 C08F220/06

    摘要: Graft copolymer (P) which exhibit pH dependent swelling/dissolution properties comprising a hydrophobic back-bone and graft chains comprising acidic monomer. This Graft copolymer (P) do not swell or dissolve at acidic pH prevalent in the stomach and they swell/dissolve at near neutral pH prevalent in the intestinal region. The graft copolymer (P) is useful for the development of drug delivery formulations particularly for oral drug delivery formulations.

    摘要翻译: 表现出pH依赖性溶胀/溶解性能的接枝共聚物(P),其包含疏水性背骨和包含酸性单体的接枝链。 这种接枝共聚物(P)在胃中普遍存在的酸性pH下不溶胀或溶解,并且它们在肠道中普遍存在的接近中性pH下溶胀/溶解。 接枝共聚物(P)可用于开发特别用于口服药物递送制剂的药物递送制剂。

    Controlled Release Breaker Composition for Oil Field Applications
    7.
    发明申请
    Controlled Release Breaker Composition for Oil Field Applications 有权
    油田应用的控制分解断路器组成

    公开(公告)号:US20130112413A1

    公开(公告)日:2013-05-09

    申请号:US13292304

    申请日:2011-11-09

    IPC分类号: E21B43/27 C09K8/60

    摘要: The present invention relates to encapsulated breakers and the use of encapsulated breakers for breaking viscosified treatment fluids. One embodiment of the present invention provides a method of providing a viscosified treatment fluid having a first viscosity having a gelling agent, a crosslinking agent, a proppant, an aqueous-base fluid, and an encapsulated breaker composition having an encapsulant that has a poly(meth)acrylate blend; introducing the viscosified treatment fluid in the subterranean formation; creating or enhancing a fracture in a subterranean formation; and allowing the encapsulated breaker composition to release the breaker so as to reduce the viscosity of the viscosified treatment fluid to a second viscosity.

    摘要翻译: 本发明涉及封装的破裂剂以及用于破坏增稠的处理流体的封装破碎剂的用途。 本发明的一个实施方案提供了一种提供具有第一粘度的增粘处理流体的方法,所述第一粘度具有胶凝剂,交联剂,支撑剂,含水基液和具有密封剂的包封破乳剂组合物,所述密封剂具有聚( 甲基)丙烯酸酯共混物; 在地层中引入稠化处理液; 产生或增强地层中的断裂; 并且允许包封的破碎剂组合物释放断路器,以便将粘稠的处理流体的粘度降低到第二粘度。

    Controlled release breaker composition for oil field applications
    10.
    发明授权
    Controlled release breaker composition for oil field applications 有权
    用于油田应用的控释式断路器组成

    公开(公告)号:US08695704B2

    公开(公告)日:2014-04-15

    申请号:US13292304

    申请日:2011-11-09

    摘要: The present invention relates to encapsulated breakers and the use of encapsulated breakers for breaking viscosified treatment fluids. One embodiment of the present invention provides a method of providing a viscosified treatment fluid having a first viscosity having a gelling agent, a crosslinking agent, a proppant, an aqueous-base fluid, and an encapsulated breaker composition having an encapsulant that has a poly(meth)acrylate blend; introducing the viscosified treatment fluid in the subterranean formation; creating or enhancing a fracture in a subterranean formation; and allowing the encapsulated breaker composition to release the breaker so as to reduce the viscosity of the viscosified treatment fluid to a second viscosity.

    摘要翻译: 本发明涉及封装的破裂剂以及用于破坏增稠的处理流体的封装破碎剂的用途。 本发明的一个实施方案提供了一种提供具有第一粘度的增粘处理流体的方法,所述第一粘度具有胶凝剂,交联剂,支撑剂,含水基液和具有密封剂的包封破乳剂组合物,所述密封剂具有聚( 甲基)丙烯酸酯共混物; 在地层中引入稠化处理液; 产生或增强地层中的断裂; 并且允许包封的破碎剂组合物释放断路器,以便将粘稠的处理流体的粘度降低到第二粘度。