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钻杆失效一般表现为本体断裂和刺漏,钻杆螺纹处失效等。通过对钻杆在井下服役条件和材料内在因素等的分析,得出钻杆失效的原因。
Drill pipe failure is generally manifested as bulk fracture and puncture, drill pipe thread failure and so on. By analyzing the service conditions of drill pipe and the inherent factors of the material, we can get the reason of the drill pipe failure.