The pipe end thickening process of the production process of the outer flat drill pipe.

Classification:

Company News

Release time:

2021-10-15

【Summary Description】 The pipe body material of the outer flat drill pipe is low carbon alloy steel. The round billet of continuous casting and rolling is heated by a large rotary furnace and then enters an extension machine and a mandrel automatic perforator for forming. After being heated again, the inner and outer diameters are finished and straightened into the pier forging process.

外平钻杆

Outside flat drill pipeThe pipe body material is low-carbon alloy steel. The round billet of continuous casting and rolling is heated by a large rotary furnace and then enters an extension machine and a mandrel automatic perforator for forming. After reheating, the inner and outer diameters are finished and straightened into the pier forging process.

DueOutside flat drill pipeThe weld is the weakest link in the use process. Before welding, the seamless pipe should be thickened at both ends of the pipe body to increase the thickness to improve the strength of the weak part, so that the overall strength of the weld is greater than the overall strength of the pipe body. According to the drill pipe diameter is generally divided into internal and external thickening, internal thickening, external thickening3Type, of which the internal and external thickening type is the main. The process of pipe end thickening is first to heat and heat the pipe end of the seamless pipe;

The second is to use hydraulic or pneumatic way to pier the pipe end, the outer surface by mold molding, the inner surface by temperature gradient natural molding.

The key technology of pipe end thickening is the forming of the transition zone on the inner surface, because this part is the weakest in use, the most complex force, and there are about70%All accidents occurred in this area, so yesOutside flat drill pipeThe quality is important.

Key words:

weilida drill