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    Cementitious compositions and methods for use in subterranean wells
    3.
    发明授权
    Cementitious compositions and methods for use in subterranean wells 失效
    用于地下井的水泥组合物和方法

    公开(公告)号：US5749418A

    公开(公告)日：1998-05-12

    申请号：US834065

    申请日：1997-04-14

    申请人： Sudhir Mehta ,  William J. Caveny

    发明人： Sudhir Mehta ,  William J. Caveny

    IPC分类号： C04B22/12 ,  C04B28/04 ,  C04B40/00 ,  C09K8/46 ,  E21B33/13

    CPC分类号： C04B22/12 ,  C04B28/04 ,  C04B40/0039 ,  C09K8/46

    摘要： A cementitious composition is provided comprising a hydraulic cementitious material, iron chloride and sufficient water to form a pumpable slurry. The iron chloride predictably enhances the rheology and performance of the composition. Methods of cementing subterranean wells are accomplished by mixing together the hydraulic cementitious material, iron chloride and sufficient water to form a pumpable slurry; pumping the slurry to a selected location within the wellbore; and then allowing the slurry to solidify within the well.

    摘要翻译： 提供了一种水泥组合物，其包括水硬性水泥材料，氯化铁和足量的水以形成可泵送的浆料。 氯化铁可预测地提高组合物的流变性能和性能。 固井地下井的方法是通过将水硬性水泥材料，氯化铁和足量的水混合在一起来形成可泵送的浆料; 将浆料泵送到井眼内的选定位置; 然后使浆料在孔内固化。

    Method and apparatus for preparing slurry specimens for cryo-scanning electron microscopy
    4.
    发明授权
    Method and apparatus for preparing slurry specimens for cryo-scanning electron microscopy 失效
    制备冷冻扫描电子显微镜的浆料样品的方法和设备

    公开(公告)号：US5352898A

    公开(公告)日：1994-10-04

    申请号：US64290

    申请日：1993-05-18

    申请人： Sudhir Mehta

    发明人： Sudhir Mehta

    IPC分类号： G01N1/28 ,  G01N1/42 ,  G01N33/38 ,  G01Q60/22 ,  H01J37/20 ,  H01J37/18

    CPC分类号： G01N1/286 ,  G01N1/42 ,  H01J37/20 ,  G01N33/383

    摘要： Cement slurries and similar compositions of matter may be examined by cryogenic scanning electron microscopy by preparing samples of slurries in small cylindrical specimen forming capsules which may be immersed in cryogenic fluid to freeze the cement slurries at different stages in hydration of the cement for analysis of the hydration process. The capsules are frangible so as to be able to easily remove the specimens after freezing whereupon the specimens are immersed in a cryogenic fluid and mounted in a specimen holder having cooperating support jaws which are operable from a point out of the cryogenic fluid to engage and retain the specimen on the holder. The holder is placed in a specimen preparation chamber which is maintained at a sufficiently low temperature and vacuum condition to minimize contamination of the specimen during preparation. The specimen preparation chamber is formed by a housing which includes a fracturing knife which is actuated after placement of the specimen in the chamber to fracture the specimen and expose an uncontaminated surface of the specimen for further preparation of the specimen for examination by scanning electron microscopy.

    摘要翻译： 可以通过低温扫描电子显微镜检查水泥浆料和类似的物质组成，通过在小圆柱形试样形成胶囊中制备浆料样品，可以将其浸入低温流体中以在水泥水化不同阶段冻结水泥浆料，以分析 水化过程。 胶囊是易碎的，以便能够在冷冻之后容易地移除样品，由此将样品浸入低温流体中，并将​​其安装在具有配合的支撑爪的样本保持器中，该保持爪可从低温流体的一个点操作以接合和保持 支架上的标本。 将保持器放置在保持在足够低的温度和真空条件下的样品制备室中，以最小化准备期间样品的污染。 样品制备室由包括压裂刀的壳体形成，该压裂刀在样品放置在室中之后被致动，以将样品断裂并暴露样品的未受污染的表面，以进一步制备样品以通过扫描电子显微镜检查。