Drill pipe profile

Drill pipe steel pipes preferentially purchase TPCO steel pipes according to the needs of users. The minimum integral thickness for the procurement of drill pipe steel pipes is 95% WT and PSL-3 standards are implemented. It is slightly rough and after heat treatment, the impact energy of UTG - at an average impact energy of >100J at -20°C; individual impact energy >80J.

The length and radius of the upset transition zone meet the requirements of NS-1. The internal transition length is >100mm; the transition radius is 300mm.

The thickening of the pipe end of the drill pipe body adopts large-tonnage rapid hydraulic upsetting. The striking force is strong and the forming speed is fast. The size and structure of the pipe end of the product are reasonable. The fully automatic drill pipe body upsetting and thickening equipment can be upset and formed twice in succession, avoiding the risk of coarse grains caused by multiple cooling and reheating. With fewer heating times, the risk of decarburization at the upsetting part is reduced, and the risk of premature failure of the drill pipe due to piercing at the upsetting part is prevented. The upsetting speed is fast. Due to the use of a large-tonnage rapid upsetting machine, the greatest advantage is the fast forging speed, which can refine the grains well. So that although the end of the drill pipe body is heated and forged, it still has excellent mechanical properties. After heat treatment, after testing, the mechanical property index of the pipe end of the company is consistent with the mechanical property index of the mother pipe.

The advantage of large-tonnage hydraulic upsetting lies in that the mechanical properties of the product's thickened part are consistent with the properties of the mother pipe, which is more in line with the production process of drill pipes and the drilling usage process. It provides a good solution for the manufacture of drill pipes, especially for ensuring the mechanical properties of drill pipe welds.

Adopting an advanced domestic regenerative combustion walking beam heating furnace ensures the uniformity of temperature when heating the pipe body. The side-opening furnace door ensures the consistency of temperature when the pipe body is discharged from the furnace, making it easier for the pipe body to obtain the same cooling speed during quenching and cooling. After heat treatment, the pipe body has a dense structure, uniform mechanical properties, and high impact toughness. After the pipe body exits the quenching furnace, it undergoes full-length descaling, making the appearance of the heat-treated pipe body smooth and improving the accuracy of subsequent nondestructive testing, effectively ensuring product quality. Through drilling tool design performance software, calculate the pipe body and joint parameters, and automatically detect whether the designed parameters theoretically meet the actual requirements.