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中文摘要：
为实现2口水平井的精确连通，引入了磁场测距导向工具，开展了U型水平井井身剖面设计方法研究。在对井眼轨迹不确定性分析过程中，引入了合成误差圆。通过对比合成误差圆直径与磁场测距导向工具测距范围的大小，得到2种磁场测距导向工具的使用时机。根据磁场测距导向工具的选择使用情况以及测量特点，设计了相应的井身剖面。额外延伸部分为剖面设计的关键所在，根据测距范围给出了其精确的计算公式。通过实例验证可以看出此剖面设计是合理的。U型水平井的井身剖面设计体现了钻井设计与控制一体化，对今后的深入研究和实践具有参考意义。
英文摘要：
In order to realize accurate connection of two horizontal wells, a magnetic ifeld ranging steering tool was introduced, and research was conducted on the design of U-shaped horizontal wellbore proifle. While conducting uncertainty analysis of wellbore trajectory, a composite error circle was introduced. By comparing the diameter of the composite error circle with the ranging size of the magneticifeldrangingsteeringtool,thetimings for using two magnetic ranging steering tools were obtained. Based on the selection and use of the magnetic ranging steering tool and measuring characteristics, the relevant wellbore proifle was designed. The additionally extended part was the key part in proifle design, and its accurate calculation equation was given by the ranging size. Example veriifcation shows that this proifle design is reasonable. The U-shaped horizontal well proifle design relfects the integration of drilling design with control, providing reference signiifcance for further study and practice in the future.
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