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公开(公告)号：US20050182155A1
公开(公告)日：2005-08-18
申请号：US10778895
申请日：2004-02-13
CPC分类号： C09D5/031 , C08J3/2053 , Y10S524/904
摘要： In one aspect, a method for coloring powders is provided. The method includes mixing a base powder and a stable colorant dispersion. In another aspect, a colored powder composition having a core particle and at least a partial shell about the core particle is provided.
摘要翻译： 一方面，提供粉末着色方法。 该方法包括混合基础粉末和稳定的着色剂分散体。 在另一方面，提供了具有核心颗粒和至少部分壳体的核心颗粒的着色粉末组合物。
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公开(公告)号：US4720247A
公开(公告)日：1988-01-19
申请号：US930272
申请日：1986-11-14
摘要： A oil well reciprocating piston pump is fluid pressure operated from a source at the earth's surface. The piston is hollow and serves also as a sealed cylinder for a free piston which is gas biased downwardly. The underside of the free piston is in contact with a body of oil displaceable from the sealed cylinder into the annular space between the hollow piston and its cylinder to bias the hollow piston toward the bottom of its stroke.
摘要翻译： 油井往复式活塞泵是从地球表面的源流体压力运行的。 活塞是中空的，并且还用作用于向下偏压的自由活塞的密封圆柱体。 自由活塞的下侧与可从密封圆筒移动到中空活塞与其气缸之间的环形空间的油体接触，以将中空活塞偏压到其行程的底部。
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公开(公告)号：US4770448A
公开(公告)日：1988-09-13
申请号：US906384
申请日：1986-09-12
IPC分类号： E21B17/042 , F16L15/04
CPC分类号： F16L15/003 , E21B17/042 , E21B17/043 , Y10S285/906
摘要： A pipe joint coupling member for deep well pipe strings has a female thread with a slightly longer pitch than the standard API thread of the pipe end. The differences in pitch is predetermined so as to equal the elastic elongation of the pipe end threads due to loading of the made up joints when suspended in a well. The coupling, in addition to having a slightly longer thread pitch may also have a different taper or tapers than that of the standard pipe end.
摘要翻译： 用于深井管柱的管接头联接构件具有内螺纹，其具有比管端的标准API螺纹略长的间距。 间距的差异是预先确定的，以便等于当悬挂在井中时组装接头的装载时管端螺纹的弹性伸长率。 除了具有稍长的螺距之外，联轴器还可以具有与标准管端的锥度或锥度不同的锥度或锥度。
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