Fatigue fracture is the main failure form of mining drill pipe joints, which directly leads to the occurrence of drill pipe drop accidents. Based on the principle of engineering bionics, the spine structure and kinematic behavior characteristics of cheetah were studied; the bionic design and trial production of drill pipe joints were carried out. For the bionic drill pipe joint, it separates the torsion transmission function from the connection function, and when the torsion transmission function of the joint fails, the connection function is still effective, so as to achieve the effect of “breaking the bones and connecting the ribs.” The mechanical and flow field properties of the bionic drill pipe joint were analyzed. Mechanical test results showed that, for the bionic drill pipe joint, the average tensile capacity was 555.48 kN and the average torsion capacity was 8914.13 N·m, which met the mechanical performance requirements. The flow field numerical simulation results showed that, when the drilling fluid velocity field and pressure field were stable and change evenly, there is no risk of leakage. The study results can provide a new research idea for the research and development of mine drill pipe joint with long life and antidropping function.

中文翻译：

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基于仿生理论的柔性钻杆接头设计与性能研究

疲劳断裂是矿山钻杆接头的主要失效形式，直接导致钻杆掉落事故的发生。基于工程仿生学原理，研究了猎豹的脊柱结构和运动学行为特征；开展了钻杆接头仿生设计和试制。对于仿生钻杆接头，将扭力传递功能与连接功能分开，当接头的扭力传递功能失效时，连接功能仍然有效，从而达到“断骨联结”的效果。肋骨。” 分析了仿生钻杆接头的力学和流场特性。力学试验结果表明，仿生钻杆接头的平均抗拉能力为555。48 kN，平均抗扭能力为8914.13 N·m，满足机械性能要求。流场数值模拟结果表明，当钻井液速度场和压力场稳定且变化均匀时，不存在泄漏风险。研究结果可为矿用长寿命防脱落钻杆接头的研发提供新的研究思路。