P110 steel level high frequency straight welded pipe manufacturing method

Abstract

A P110 steel level high frequency straight welded pipe manufacturing method comprises (1) taking hot-rolled coil as raw material; (2) shaping the coil into a straight seam pipe by continuous shaping techniques, welding the straight seam on the pipe by a high frequency inductive welding machine to produce a primary pipe, and after the welding, timely removing external and internal burrs of the primary pipe; (3) heating the primary pipe removed of burrs by a medium frequency induction furnace to 920-950 degrees centigrade and conveying it to a hot rolling and diameter reducing machine, rolling the primary pipe into pipe blanks with different apertures by hot mechanical rolling; (4) conducting whole-pipe quenching and tempering to the hot roller pipe blank to produce finished pipe; (5) conducting ultrasonic flaw detection and pipe end magnetic powder inspection to the finished pipe. The invention takes low steel level coil as raw material to produce primary pipe, produces pipe blanks with different diameter specifications by the primary pipe with the same specification, and produces oil casing product with high steel level and high performance by low steel level economical pipe blanks. The working efficiency is high. The production cost is low.

Description

technical field [0001] The invention belongs to the technical field of manufacturing high-frequency high-frequency straight seam welded pipes of high steel grades, in particular to a method for manufacturing P110 steel grade high-frequency straight seam welded pipes, in particular referring to the use of hot-rolled coils to produce the P110 steel grade petroleum sleeves stipulated in the API5CT standard The process method of pipe and oil pipe. Background technique [0002] Many oil fields in my country have entered the middle and late stages of development, and the development is becoming more and more difficult, and the well conditions are becoming more and more complex. Especially, the drilling of deep wells and ultra-deep wells puts forward higher requirements on the performance of casings. my country's high-strength oil casings The demand for pipes and oil pipes is increasing day by day. According to statistics, for every 1m of drilling, about 62Kg of oil well pipes are ...

AI Technical Summary

Problems solved by technology

The products produced by the existing oil casing and oil pipe manufacturing technology are not only high in cost, but also cannot meet the requirements of complex well conditions. Therefore, the production and process of high-grade, high-performance high-frequency straight seam welding oil casing and oil pipe Research and manufacture of high-quality and low-cost oil well pipes has become a top priority, which has far-reaching significance for improving oilfield production efficiency and reducing production costs

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