随着定向钻穿越技术的广泛应用,“多接一”(主要指“几十接一”形式)回拖方式对解决定向钻工艺受回拖场地限制有重要意义,但“多接一”回拖方式的运用同样存在不少限制条件。通过对工程实例的分析对比,总结出“多接一”回拖方式和常规定向钻一次回拖的差异和技术难点,并提出应对措施。“多接一”回拖方式适宜在基岩等稳定性较好的地层条件下应用。各项工序之间必须紧密衔接,尽可能缩短回拖暂停时间,以保证整个施工过程高效顺利完成。结合铺管船和支撑架等发送方式,定向钻“多接一”回拖方式值得推广应用。

With the wide application of horizontal directional drilling technology, the method of multiple connections-pullback, primarily referring to those involving dozens of connections, is crucial in addressing the issue of spatial constraints at the drilling site. Nonetheless, this method does come with its own set of limitations. By analyzing and comparing various engineering examples, this paper aims to highlight the differences and technical challenges between multiple connectionspullback and traditional pullback methods in the context of horizontal directional drilling. This paper also proposes potential countermeasures, offering theoretical references and successful experiences for future projects of the same nature. The multiple connectionspullback method is suitable for application under stable formation conditions such as bedrock. Each process must be closely connected, and the suspension time of pullback should be minimized to ensure a successful construction process. When combined with methods such as pipelaying ship and support frames for pipe sending, the multiple connectionspullback method holds significant promise for widespread applications.