Emulsion polymerization in the presence of a stable free radical
    21.
    发明授权
    Emulsion polymerization in the presence of a stable free radical 失效
    在稳定的自由基存在下进行乳液聚合

    公开(公告)号:US06353065B1

    公开(公告)日:2002-03-05

    申请号:US09347573

    申请日:1999-07-06

    IPC分类号: C08F224

    CPC分类号: C08F2/38 C08F4/00

    摘要: A process for the emulsion polymerization in the presence of a stable free radical of at least one monomer which can be polymerized by the radical route, which emulsion comprises a liquid aqueous phase and a liquid organic phase, the aqueous phase comprising at least 50% by weight of water and the liquid organic phase comprising more than 50% by weight of monomer(s) to be polymerized. The invention results, by a rapid controlled polymerization process, in a latex of polymer particles, it being possible for the polymer to comprise acrylate and/or methacrylate blocks.

    摘要翻译: 在可通过自由基途径聚合的至少一种单体的稳定自由基的存在下进行乳液聚合的方法,该乳液包含液体水相和液体有机相,所述水相包含至少50%的 重量的水和液体有机相包含大于50重量%的要聚合的单体。 本发明通过快速控制的聚合方法得到聚合物颗粒的胶乳,聚合物可以包含丙烯酸酯和/或甲基丙烯酸酯嵌段。

    Use of gel-based compositions for reducing the production of water in
oil- or gas-producing wells
    23.
    发明授权
    Use of gel-based compositions for reducing the production of water in oil- or gas-producing wells 失效
    使用凝胶基组合物来减少产油井或产气井的水分

    公开(公告)号:US5322123A

    公开(公告)日:1994-06-21

    申请号:US920444

    申请日:1992-08-20

    摘要: The invention has as its object the use of new composition of gels that can be used for the reduction of the production of water in oil- or gas-producing wells.The compositions of gels comprise a solution of at least one water-soluble complex of a polyvalent metallic cation such as zirconium lactate able to cross link a nonionic polysaccharide such as scleroglucan, at a concentration of 2 to 10,000 parts per million of parts, expressed by weight of metal dioxide. With a preferred concentration of 2 to 100 ppm, the oil permeability is not appreciably affected.The compositions make possible the formation of aqueous gels of scleroglucan that can be used for the prevention of inflows of water into the hydrocarbon-producing wells.

    摘要翻译: PCT No.PCT / FR91 / 00850 Sec。 371日期:1992年8月20日 102(e)日期1992年8月20日PCT 1991年10月28日PCT公布。 出版物WO92 / 08038 日期为1992年5月14日。本发明的目的是使用新的凝胶组合物,其可用于降低产油井或产气井中的水的产生。 凝胶的组合物包含至少一种多价金属阳离子的水溶性络合物的溶液,例如乳酸铵,能够交联非离子多糖例如硬葡聚糖,浓度为每百万分之2至10,000份,表示为 二氧化碳的重量。 优选的浓度为2〜100ppm,油渗透性不受影响。 该组合物可以形成可用于防止水流入烃生产井中的硬化葡聚糖水凝胶。