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简要地介绍了水平径向钻井系统的基本结构和作用原理，分析了钻柱通过转向器的受力情况及径向井眼阻力R对钻柱通过转向器阻力岭的影响。由对转向器以上一段钻柱稳定性的分析，认为不宜以钻井液作用在钻柱上端的推力作为钻柱动力，欲使钻柱安全地工作，转向器以上一段钻柱应为拉杆。由钻柱所受径向井眼阻力R的变化，讨论了钻柱通过转向器的运动情况。指出要钻更长的径向水平并段，必须减小或消除径向井眼阻力R。为此，应在转向器、高压水射流破岩钻井技术、钻柱运动控制技术和井眼轨迹控制技术等四个方面加强研究。
The basic structure and working principle of a horizontal radial drilling system are briefly introduced. The stress of the drill string passing through the steering gear and the influence of the radial borehole resistance R on the resistance of the drill string passing the steering gear are analyzed. Based on the analysis of the stability of a drill string above the steering gear, it is not advisable to use the thrust of the drilling fluid acting on the upper end of the drill string as the drill string power. For the drill string to work safely, a drill string above the steering gear should be a tie rod. The variation of radial borehole resistance R affected by the drill string is discussed, and the movement of the drill string through the steering gear is discussed. Pointed out that to drill a longer radial horizontal section, the radial borehole resistance R must be reduced or eliminated. Therefore, the research should be strengthened in four aspects: steering gear, rock breaking drilling with high pressure water jetting, control technology of drilling string motion and well trajectory control technology.