复杂地层下水平定向钻穿越前的清障技术方案

Technical Solutions for Obstacle Clearance before Horizontal Directional Drilling Under Complex Formations

以嘉陵江水平定向钻穿越工程为例,当遇到的复杂地层条件施工受阻时,综合分析了夯套管施工和全回转全套管钻机清障方案的技术可行性和经济适用性。介绍了全回转全套管钻机清障施工现场钻孔布置、工艺流程和选用设备,同时针对施工中遇到的实际问题给出了解决措施。这为后续复杂地层条件下的水平定向钻穿越施工顺利进行提供了借鉴。

Taking the horizontal directional drilling crossing project of Jialing River as an example,when the construction is blocked by complex formation conditions,the technical feasibility and economic applicability of pipe ramming construction and full-rotation drill rig for obstacle clearance are comprehensively analyzed.The drilling arrangement,process flow and equipment selection of the full-rotation drill rig for obstacle clearance construction site are introduced.At the same time,solutions are given for the actual problems encountered in the construction,which provide reference for the smooth progress of the horizontal directional drilling crossing construction under complex formation conditions.