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首页> 外文会议>2004 AGA operating section proceedings >Directional-Drilled Polyethylene Gas Pipe
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Directional-Drilled Polyethylene Gas Pipe

机译：定向钻孔聚乙烯燃气管

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Horizontal directional drilling or guided boring, as it is sometimes called, is a cost effectivernmethod for installation of polyethylene gas pipe in urban and congested suburban areas. Mostrnurban/suburban communities prefer trenchless installation to open-cut trenching because of thernreduced disturbance to business, traffic, and surface features such as landscaping. Many gasrnutilities have come to appreciate the advantages of directional drilling, finding it easier and morerncost effective not only to install pipe in populated areas but also easier to get regulatory approvalrnthrough environmentally sensitive regions. Since this installation method is becoming widelyrnused, it is important for gas utilities to understand the engineering and construction aspects ofrndirectional drilling.rnThis paper describes and discusses the major engineering considerations for directionallyrndrilled pipe both during pull-in (pullback) installation and post-installation service. It discussesrnways to determine the applied forces and how to compare these forces with the pipe’srnperformance limits for tensile strength, external collapse, bending, and ring deflection. This paperrndraws heavily on ASTM F1962, “Standard Guide for Use of Maxi-Horizontal DirectionalrnDrilling for Placement of Polyethylene Pipe or Conduit Under Obstacles, Including RiverrnCrossings”, thus acquainting the gas utility engineer with this useful standard.
机译：有时被称为水平定向钻井或导向钻孔，是在城市和拥挤的郊区安装聚乙烯燃气管道的一种经济有效的方法。由于减少了对业务，交通和地面美化（如园林绿化）的干扰，大多数城市/郊区社区更喜欢无沟槽安装而不是明挖沟槽。许多天然气公用事业公司已经意识到定向钻井的优势，发现不仅在人口稠密的地区安装管道更容易，更具成本效益，而且更容易通过环境敏感地区获得监管部门的批准。由于这种安装方法正在被广泛使用，因此对于燃气公用事业公司来说，了解定向钻井的工程和施工方面很重要。本文描述并讨论了在定向（拉回）安装和安装后服务期间定向钻井的主要工程考虑因素。 。它讨论了确定施加力的方法，以及如何将这些力与管道在拉伸强度，外部塌陷，弯曲和环挠度方面的性能极限进行比较。本文大量借鉴了ASTM F1962，“在障碍物（包括RiverrnCrossings）等障碍物下放置聚乙烯管或导管的最大水平定向钻井的使用标准指南”，从而使燃气公用事业工程师熟悉此有用的标准。

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