Fluid loss control agents for drilling fluids containing divalent cations
    4.
    发明授权
    Fluid loss control agents for drilling fluids containing divalent cations 失效
    含有二价阳离子的钻井液的流体损失控制剂

    公开(公告)号:US4600515A

    公开(公告)日:1986-07-15

    申请号:US650316

    申请日:1984-09-12

    CPC分类号: C09K8/24

    摘要: Low and high solids drilling fluids containing high levels (i.e., at least 10,000 ppm) of divalent cations are provided with improved fluid loss control by employing high molecular weight water-in-oil emulsion copolymers of acrylamide and a water soluble salt of acrylic acid. The copolymers, produced by the copolymerization in water-in-oil emulsions form of acrylamide and acrylic acid or the salt thereof in molar ratios of 70:30 to 95:5 are particularly effective in drilling fluids containing high levels of calcium ions.

    摘要翻译: 通过使用丙烯酰胺和水溶性丙烯酸盐的高分子量油包水乳液共聚物,含有高水平(即至少10,000ppm)二价阳离子的低固体和高固含量钻井液被提供改进的流体损失控制。 通过丙烯酰胺和丙烯酸的油包水乳液形式的共聚合,其摩尔比为70:30至95:5的共聚物在含有高含量钙离子的钻井液中特别有效。

    Process for reacting quaternary ammonium monomer in the presence of
anionic polymers
    5.
    发明授权
    Process for reacting quaternary ammonium monomer in the presence of anionic polymers 失效
    在阴离子聚合物存在下使季铵单体反应的方法

    公开(公告)号:US4517351A

    公开(公告)日:1985-05-14

    申请号:US621403

    申请日:1984-06-18

    IPC分类号: C08F26/02 C08L99/00

    CPC分类号: C08F26/02

    摘要: Quaternary ammonium monomers and monomers copolymerizable therewith are reacted in the presence of anionic polymers to directly form a dry coacervate by a process which comprises forming a solution comprising the monomer(s), the anionic polymer, solvent(s) and a free-radical initiator and simultaneously polymerizing and drying the solution at a temperature above the boiling point of the solvent.

    摘要翻译: 可与其共聚的季铵单体和单体在阴离子聚合物的存在下反应,以通过包括形成包含单体,阴离子聚合物,溶剂和自由基引发剂的溶液的方法直接形成干凝聚层 并在高于溶剂沸点的温度下同时聚合和干燥溶液。

    Cementiferous compositions
    6.
    发明授权
    Cementiferous compositions 失效
    水泥组合物

    公开(公告)号:US4473406A

    公开(公告)日:1984-09-25

    申请号:US500598

    申请日:1983-06-08

    IPC分类号: C04B24/26 C04B7/35

    CPC分类号: C04B24/26

    摘要: This invention provides cementiferous compositions having improved flow characterisitics which are given by the incorporation of certain hydroxy acrylate copolymers. Typical copolymers are of acrylic or methacrylic acid with a hydroxyalkyl acrylate or methacrylate and are used preferably in the range 0.01% to 2.5% w/w on the cement in the cementiferous composition. This invention also provides novel additive compositions for use in the cementiferous compositions.

    摘要翻译: 本发明提供了通过掺入某些羟基丙烯酸酯共聚物给出的具有改进的流动特性的含水组合物。 典型的共聚物是丙烯酸或甲基丙烯酸与丙烯酸羟烷基酯或甲基丙烯酸羟烷基酯,优选在含水组合物中的水泥上使用0.01%至2.5%w / w的范围。 本发明还提供了用于含水组合物中的新型添加剂组合物。

    Contraceptive composition
    7.
    发明授权
    Contraceptive composition 失效
    避孕组合物

    公开(公告)号:US4432967A

    公开(公告)日:1984-02-21

    申请号:US392266

    申请日:1982-06-25

    CPC分类号: A61K31/795 Y10S424/14

    摘要: A contraceptive composition for vaginal administration which contains a salt of a sulfonated styrene polymer and a pharmaceutically acceptable carrier. Effective polymers have a degree of substitution of from about 0.7 to 1.3 and an average molecular weight of between 600 and 7,000,000.

    摘要翻译: 一种用于阴道给药的避孕组合物,其包含磺化苯乙烯聚合物的盐和药学上可接受的载体。 有效聚合物的取代度为约0.7至1.3,平均分子量为600至700,000。