Titanium alloy drill rod pipe body end upsetting equipment

Abstract

The invention provides titanium alloy drill rod pipe body end upsetting equipment, wherein a heating furnace is connected with an upsetting die; a heating coil is installed on the inner wall of the heating furnace; a gas channel is formed in the bottom of the heating furnace; a baffle A is installed at one end of the heating furnace; an inner-layer baffle A is connected to the end of the heating furnace; an outer-layer baffle A is installed on the outer side of the inner-layer baffle A; a round hole is formed in the middle of the outer-layer baffle A; a baffle B is installed at one end of the upsetting die; an inner-layer baffle B is connected to the end of the upsetting die; an outer-layer baffle B is installed on the outer side of the inner-layer baffle B; and a round hole is formed in the middle of the outer-layer baffle B. The method has the advantages that: the heating furnace and the upsetting die are connected to form a relatively sealed space; the space is filled with CO2 which is stable in performance and has the density larger than that of air; a pipe body at high temperature is isolated from oxygen; the defects of inclusion, folding, cracks and the like caused by oxide skin at the upsetting forming part of the pipe body are avoided; the risk of metal oxidation on the surface of the pipe body is reduced; the upsetting quality of the pipe body is improved; the qualified rate of drill rod production is improved; and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of special equipment for manufacturing drill pipes, in particular to a titanium alloy drill pipe body tube end upsetting equipment. Background technique [0002] Titanium alloy drill pipes used in oil and gas exploration and development have the characteristics of corrosion resistance, low density, high strength and good elasticity, and are used in drilling operations of highly acidic oil and gas reservoirs, ultra-deep wells, and ultra-short horizontal wells. At the same time, titanium alloy is a kind of precious metal, its material cost is about 25 times that of steel drill pipe, and titanium alloy material is highly oxidizable, and it is easy to oxidize and form an oxide layer under high temperature conditions. Therefore, in the upsetting process of the pipe body end in the titanium alloy drill pipe manufacturing process, the titanium alloy drill pipe undergoes an oxidation reaction with oxygen at high tem...

AI Technical Summary

Problems solved by technology

Therefore, in the upsetting process of the pipe body end in the titanium alloy drill pipe manufacturing process, the titanium alloy drill pipe undergoes an oxidation reaction with oxygen at high temperature to form an oxide layer. As the heating temperature increases and the heating time increases, the oxidation The thicker the thickness of the layer, the easier it is to cause the inclusion of the oxide layer on the surface of the pipe body and the initiation of surface cracks during upsetting, which not only increases the processing allowance of the pipe end, but also reduces the qualified rate of upsetting, increases the manufacturing cost, and seriously restricts Application and promotion of titanium alloy drill pipe

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