What are the common reasons for drill pipe failure? Analysis of the failure causes of coal mine drill pipes can effectively improve the service life of drill pipes.
The failure of the drill pipe is generally manifested as body fracture and puncture, failure at the thread of the drill pipe, etc. Kaiqiu drilling tools will show you the common reasons for failure.
1. Basic mechanical conditions. The drill pipe works in a long and narrow wellbore filled with drilling fluid inside and outside and usually bears loads such as pressure, bending, torsion, hydraulic force, etc., and gradually produces fatigue micro-cracks, resulting in the fracture of the drill pipe;
2. The good diameter is irregular. In the good section with an irregular well diameter or serious diameter expansion, the bending degree of the drill pipe increases accordingly. When the drill pipe rotates, the alternating bending stress on the connecting thread will accelerate the fatigue failure of the drill pipe. Increased thread fatigue damage;
3. Drill pipe structure and material. The thread is the weak link on the entire drill string. When it is used frequently, the puncture of the male and female buttons at the thread is also a common phenomenon. Defects in the drill pipe material are the weak link in the drill pipe. In the service environment where the drill pipe is subjected to complex forces, it is also easy to cause drill pipe fracture accidents.
When the top hammer drilling tools are working, the corrosion of external factors will also affect their efficiency. In normal use, more attention should be paid to these aspects to ensure the quality and quantity of the work.