What are the common failure causes of drill pipes? Analyzing the failure reasons of coal mine drill pipes can effectively improve the service life of drill pipes.

　　Drill pipe failure generally manifests as body fracture and puncture leakage, failure at the drill pipe thread, etc. KAIQIU drilling tools will make you understand the common causes of failure.

　　What are the common causes of drill pipe failure?

　　1. Basic mechanical working conditions. The drill pipe works in the long and narrow wellbore filled with drilling fluid inside and outside and usually bears loads such as pressure, bending, torsion, hydraulic force, etc., and fatigue micro-cracks gradually occur, resulting in the breakage of the drill pipe;

　　2. Irregular well diameter. In the good section with an irregular well diameter or serious diameter expansion, the bending degree of the drill pipe will increase accordingly. When the drill pipe is rotated, the connecting thread will be subjected to an alternating bending stress to accelerate the fatigue failure of the drill pipe. Exacerbated thread fatigue damage;

　　3. Drill pipe structure and material. The thread is the weakest link on the whole drill string. When it is frequently used, it is also a common phenomenon that the pin and box of the thread are punctured. The defect in the drill pipe material is the weak link in the drill pipe, and it is also easy to cause a drill pipe fracture accident in the service environment where the drill pipe is subjected to complex forces.

　　When the drill pipe is working, the corrosion of external factors will also affect its efficiency. In normal use, it is necessary to pay more attention to these aspects and ensure the quality and quantity of the operation.