It is a very important technical question whether water injection string can rely on string weight to go through the well hole or not.

注水管柱能否靠自重下放到井底是一个十分重要的技术问题。

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The anchoring or set to the artificial bottom hole of the separate injection pipe string has solved the creep of the pipe string resulted from the unstable water injection pressure.

分注管柱实施锚定或支撑到人工井底，克服了管柱因注水压力不平稳等原因造成的管柱蠕动现象；

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Considering the status of separate layer water injection in directional well, the injection tools and pipe string are developed and collocated reasonably.

针对定向井分层注水的现状，对定向井分注工具和分注管柱进行了研制和合理配置。

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