Synergistic mineral blends for control of filtration and rheology in silicate drilling fluids
    1.
    发明授权
    Synergistic mineral blends for control of filtration and rheology in silicate drilling fluids 失效
    用于控制硅酸盐钻井液中过滤和流变学的协同矿物混合物

    公开(公告)号:US06248698B1

    公开(公告)日:2001-06-19

    申请号:US09439551

    申请日:1999-11-12

    IPC分类号: C09K702

    CPC分类号: C09K8/16 C09K2208/18

    摘要: A silicate drilling fluid having effective rheology and filtration control properties comprising water as a continuous phase wherein hematite is used as a weighting agent and manganese oxide is used as a bridging agent. The drilling fluids uses a minimal number of components, which includes a salt, preferably sodium chloride, water-soluble polymers for viscosification and filtration control, and a glycol for shale stabilization and filtration control.

    摘要翻译: 使用具有有效的流变性和过滤控制性能的硅酸盐钻井液作为桥接剂,其包含水作为连续相,其中赤铁矿用作加重剂和氧化锰。 钻井液使用最少数量的组分,其包括盐,优选氯化钠,用于粘度和过滤控制的水溶性聚合物,以及用于页岩稳定和过滤控制的二醇。

    Controlled hydration of starch in high density brine dispersion
    2.
    发明授权
    Controlled hydration of starch in high density brine dispersion 失效
    淀粉在高密度盐水分散体中的控制水合

    公开(公告)号:US06933262B1

    公开(公告)日:2005-08-23

    申请号:US08869109

    申请日:1997-06-04

    IPC分类号: C09K8/08 C09K3/00

    摘要: A method for producing a precursor polymer dispersion for addition to a brine for use in drilling and completion operations comprising providing a precursor brine having a first salt content, and mixing a water-soluble polymer with the precursor brine at a sufficient concentration and under conditions sufficient to produce a precursor polymer dispersion effective at a sufficient concentration in a final brine having a second salt content to improve the rheology and/or fluid loss control properties of the final brine.

    摘要翻译: 一种制备用于添加到用于钻井和完井操作的盐水中的前体聚合物分散体的方法,包括提供具有第一盐含量的前体盐水,并将水溶性聚合物与前体盐水以足够的浓度和足够的条件混合 以产生在具有第二盐含量的最终盐水中足够浓度有效的前体聚合物分散体,以改善最终盐水的流变学和/或流体损失控制性能。