φ73 mm×5 mm薄壁摩擦焊绳索取心钻杆的研制

Development of φ73mm×5mm Thin Wall Wire-line Coring Drill Pipe by Friction Welding

摘要:

介绍了国内绳索取心钻杆和摩擦焊技术的现状。通过对3种深孔绳索取心钻杆连接结构和生产过程的对比，分析了薄壁摩擦焊绳索取心钻杆用于深孔钻探的优势。介绍了φ73 mm×5 mm薄壁摩擦焊绳索取心钻杆的结构设计和加工过程，提出了焊接过程的主要技术问题和注意事项。通过拉力扭矩试验得出钻杆主要技术参数，能承受的最大拉力580 kN，最大扭矩5500 N·m，建议使用深度2000～3000 m。

Abstract:

The current situation of coring drill pipe and friction welding technology is presented. Through the comparison of 3 kinds of deep hole wire-line coring drill pipe connection structure and production process, analysis was made on the advantages of the use of thin-wall wire-line coring drill pipe by friction welding in deep hole drilling. The paper introduces the structure design and the machining process of φ73mm×5mm thin-wall wire-line coring drill pipe by friction welding and puts forward the main technical problems and matters needing attention in the welding process. The main technical parameters of the drill pipe are obtained through the tension and torque tests, the maximum tensile force and torque are 580kN and 5500N·m respectively, and the recommended use depth is 2000～3000m.