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What is the difference between integral (one-piece) drill pipe and friction welding drill pipe?
Release time:
2022-01-07
Author:
Source:
Friction welding drill pipe is a solid-state welding method in which two drill pipes are connected together by friction welding technology. (Under the action of pressure, the material is deformed by the friction interface of the workpiece to be welded and the temperature in its vicinity, accompanied by plastic rheology of the material, and welding is realized through molecular diffusion and recrystallization of the interface.) The welding can reach the strength of the forging structure, which can be comparable to the base metal in theory.
The whole drill pipe is one-piece,The drill pipe joint and the drill pipe body of the integral drill pipe are directly connected by male and female buckles. The thickening structure of the drill pipe body, the outer wall and inner wall of the drill pipe joint are all integral thickening structures. The processing technology is that the male buckle end is firstly heated by intermediate frequency twice, forged and thickened, polished, then heated by intermediate frequency twice, and the cake is thickened.; dropWhen the workpiece is transferred, the female buckle end is heated in intermediate frequency twice, to be thickened, polished, then heated in intermediate frequency, the iron is thickened, and the thread is processed after grinding. The drill pipe and the joint of the present invention do not need friction welding, nor do they need to perform subsequent welding related processing, which simplifies the processing technology and reduces the cost of processing equipment. The drill pipe joint and the drill pipe body of the integral drill pipe are directly connected by male and female punching, To ensure the air tightness and strength of the connection, and at the same time correspondingly reduce the outer diameter of the drill pipe joint,
Key words:
Drill pipe, conduct, welding, thickening, joint, intermediate frequency, friction, heating, machining
