Processing technology of seamless drill pipe
A processing technology, seamless drill pipe technology, applied in the direction of drill pipe, drill pipe, casing, etc., can solve the problems of low service life, difference in mechanical properties of seamless drill pipe, high scrap rate of seamless drill pipe, etc., to improve Effect of service life and reduction of scrap rate
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[0038] Example 1:
[0039] Reference figure 1 , Is a seamless drill pipe processing technology disclosed in the present invention, including the following steps:
[0040] S1. Raw materials: Put pig iron into the furnace for the first refining, after the first refining, add alloy components and refining agent for the second refining, and continuously cast the round billet, and perform annealing treatment on the round billet to obtain a billet; The alloy composition is Si, Sn, Bi, In and Nb;
[0041] After the blank is prepared, flaw detection is performed on the blank. The flaw detection is preferably a physical flaw detection method, and the damaged parts are marked and removed.
[0042] S2, piercing: heating the billet, the heating temperature is controlled at 1150°C, and the billet is heated and subjected to perforation treatment to obtain a tube blank;
[0043] The tube blank obtained after the blank is pierced is tested for the eccentricity. If the eccentricity of the tube blank i...
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[0056] Example 2:
[0057] The difference between this embodiment and Embodiment 1 is that: in step S7, only one reinforcing layer is coated on the finished seamless drill pipe.
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