水平定向钻岩石层穿越套管安装工艺

在水平定向钻穿越长距离、复杂地质条件施工中，为保证穿越导向孔钻进工程的顺利进行，避免或减少钻杆在传递推力时在钻孔内产生“蛇行”弯曲、不能有效传递推力、钻进方向不易控制等不利因素，通常采用在钻机侧沿钻进方向的钻杆上加装部分套管技术。本文详细阐述了水平定向钻岩石层穿越套管安装的施工流程、安装技术措施，同时对套管的钻进、润滑、回抽等环节进行了分析，并对套管施工过程中安全注意事项提出了几点建议。

The Installation Technology Of Case During Rock Passing Of Horizontal Directional Drilling

In order to ensure the drilling project go successfully, avoid or induce some unfavorable factors during drill pipe in the transmission of thrust such as： snake-like bending in drilling, can not effectively transfer the thrust, difficult to control drilling direction and so on. In the construction of the horizontal directional drilling across long distances and complex geological conditions, we usually adopt the case installation technology on the drill along the direction of the drill. This article elaborates the construction process and installation technical measures of the installation of case during rock passing of horizontal direetional drilling in detail. It aslo analyses some links with case such as： drilling, lubricating, withdrawing and so on. Meanwhile, it makes a few suggestions on safety during construction process.