Flow velocity meter and method of measuring flow velocity of a fluid

    公开(公告)号:US10920581B2

    公开(公告)日:2021-02-16

    申请号:US16312679

    申请日:2017-06-30

    Abstract: A flow velocity meter, for measuring flow velocity of a fluid, has a distributed acoustic sensor along aq longitudinal direction, which has a distributed sensing element. The distributed sensing element is acoustically coupled to a distributed fluid-contact surface via a distributed acoustic path extending between the distributed fluid-contact surface and the distributed sensing element. Moreover the distributed acoustic path is fully bypassing the fluid. At least a part of the fluid-contact surface is provided with a flow-disturbing surface texture having a surface relief with a pre-determined pattern in said longitudinal direction. Acoustic flow noise, emitted as a result of the fluid flowing along and in contact with the flow-disturbing surface texture, is picked up by the distributed sensing element as a distributed acoustic signal.

    Integral splice for insulated conductors
    9.
    发明授权
    Integral splice for insulated conductors 有权
    绝缘导线的一体式接头

    公开(公告)号:US09080409B2

    公开(公告)日:2015-07-14

    申请号:US13644422

    申请日:2012-10-04

    CPC classification number: E21B36/04 Y10T29/49194 Y10T29/49195

    Abstract: A method includes coupling a core of a heating section to a core of an overburden section of an insulated conductor. A diameter of the core of the heating section is less than a diameter of the core of the overburden section. A first insulation layer is placed over the core of the heating section such that at least part of an end portion of the core of the heating section is exposed. A second insulation layer is placed over the core of the overburden section such that the second insulation layer extends over the exposed portion of the core of the heating section. A thickness of the second insulation layer is less than a thickness of the first insulation layer and an outer diameter of the overburden section is substantially the same as an outer diameter of the heating section.

    Abstract translation: 一种方法包括将加热部分的芯部耦合到绝缘导体的覆盖层部分的芯部。 加热部的芯的直径小于覆盖层的芯的直径。 将第一绝缘层放置在加热部分的芯部上方,使得加热部分的芯部的端部的至少一部分露出。 第二绝缘层放置在覆盖层部分的芯的上方,使得第二绝缘层在加热部分的芯的暴露部分上延伸。 第二绝缘层的厚度小于第一绝缘层的厚度,并且覆盖层部分的外径与加热部分的外径基本相同。

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