Austenitic stainless steel continuous pipe and manufacturing method thereof

Abstract

The invention discloses an austenitic stainless steel continuous pipe and a manufacturing method of the austenitic stainless steel continuous pipe. The austenitic stainless steel continuous pipe comprises, by mass percent, 0.03% or below of C, 5-10% of Mn, 13-19% of Cr, 1.5-3.0% of Ni, 0.15-0.5% of N, 0.04% or below of P, 0.01% or below of S, and the balance Fe and unavoidable impurities. A plate for the continuous pipe is manufactured through the processes of refining, controlled rolling, acid pickling and the like; pipe manufacturing is conducted by the adoption of cage-roll forming and the high frequency induction welding (HFW) technology; the austenitic stainless steel continuous pipe is manufactured through follow-up heat treatment. The austenitic stainless steel continuous pipe is good in mechanical performance and corrosion resistance, applicable to environments where the austenitic stainless steel continuous pipe makes direct contact with CO2, and capable of being used under gas wells with high CO2 content in Sichuan province, Tarim and the like, and the corrosion resistance of the austenitic stainless steel continuous pipe is improved by over 3 times compared with a common low-carbon micro-alloyed steel continuous pipe.

Description

Technical field: [0001] The invention relates to the technical field of oil and gas pipes, in particular to an austenitic stainless steel continuous pipe and a manufacturing method thereof. Background technique: [0002] Coiled tubing has been widely used in oil field workover, drilling, completion, logging, stimulation and other fields in the oil and gas industry. Coiled tubing will play an increasingly important role in oil and gas field exploration, development, operation, and production stimulation because coiled tubing technology has a series of technical and operational advantages such as high efficiency, low cost, wide operating range, and small footprint. ,with broadly application foreground. [0003] At present, coiled tubing products are mainly made of carbon steel and low-alloy high-strength steel, which can generally meet the requirements of most oilfield operations. However, as my country’s oil and gas exploration and development become more difficult, some 2 ...

AI Technical Summary

Problems solved by technology

[0003] At present, coiled tubing products are mainly made of carbon steel and low-alloy high-strength steel, which can generally meet the requirements of most oilfield operations. However, as my country’s oil and gas exploration and development become more difficult, some 2 、H 2 S, Cl - For the development of oil and gas fields in corrosive environments, the corrosion resistance of coiled tubing made of carbon steel and low-alloy high-strength steel often cannot meet the requirements of use