Composition for reducing the permeability of subterranean formations
    1.
    发明授权
    Composition for reducing the permeability of subterranean formations 失效
    用于降低地下地层渗透性的组合物

    公开(公告)号:US4526695A

    公开(公告)日:1985-07-02

    申请号:US464084

    申请日:1983-02-04

    IPC分类号: C08G63/08 C09K8/50 E21B33/138

    摘要: The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid loss control agent comprising a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. The method of the present invention comprises reducing the permeability of subterranean formations penetrated by a wellbore by placing the composition of the present invention down the wellbore.

    摘要翻译: 本发明一般涉及降低由井筒渗透的地层的渗透性的组合物和方法。 本发明的组合物包括其中分散有包含基本上不溶于井筒流体的聚酯聚合物的流体损失控制剂的井筒流体。 聚合物在水的存在下在升高的温度下降解以形成可溶于地层中的流体的小分子。 本发明的方法包括通过将本发明的组合物放置在井筒下面来降低由井眼穿透的地下地层的渗透性。

    Method for reducing the permeability of subterranean formations
    3.
    发明授权
    Method for reducing the permeability of subterranean formations 失效
    降低地下地层渗透率的方法

    公开(公告)号:US4387769A

    公开(公告)日:1983-06-14

    申请号:US291200

    申请日:1981-08-10

    摘要: The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid loss control agent comprising a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. The method of the present invention comprises reducing the permeability of subterranean formations penetrated by a wellbore by placing the composition of the present invention down the wellbore.

    摘要翻译: 本发明一般涉及降低由井筒渗透的地层的渗透性的组合物和方法。 本发明的组合物包括其中分散有包含基本上不溶于井筒流体的聚酯聚合物的流体损失控制剂的井筒流体。 聚合物在水的存在下在升高的温度下降解以形成可溶于地层中的流体的小分子。 本发明的方法包括通过将本发明的组合物放置在井筒下面来降低由井眼穿透的地下地层的渗透性。

    Films containing poly(hydroxy acid)s
    4.
    发明授权
    Films containing poly(hydroxy acid)s 失效
    含有聚(羟基酸)的薄膜

    公开(公告)号:US6027677A

    公开(公告)日:2000-02-22

    申请号:US437713

    申请日:1995-05-09

    摘要: Compatible polymer compositions and optically clear, degradable films containing from 55 to 90 wt % of a poly(hydroxy acid) polymer composition and from 10 to 45 wt % of one or more compatible thermoplastic polymers are disclosed. The films are prepared by melt processing the materials to obtain uniform composition, and forming the composition into a film of thickness from 0.01 to 2 mm. The films can be used in packaging and conventional applications.

    摘要翻译: 公开了兼容的聚合物组合物和含有55-90wt%聚(羟基酸)聚合物组合物和10至45wt%一种或多种相容的热塑性聚合物的光学透明的可降解膜。 通过熔融处理材料以获得均匀的组成,并将组合物形成厚度为0.01至2mm的膜来制备膜。 这些胶片可用于包装和常规应用。