Method for manufacturing large-aperture high-strength gathering and transportation seamless steel tube for environment with high content of hydrogen sulfide

A high hydrogen sulfide-containing, seamless steel pipe technology is applied in the field of corrosion-resistant materials and oil and gas transportation, which can solve the problems of specification range limitation, achieve the effects of reducing residual stress, ensuring uniformity, and reducing adverse effects

Inactive Publication Date: 2014-01-01
TIANJIN PIPE (GROUP) CORP
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  • Application Information

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Problems solved by technology

Publication No. CN101417296A discloses "Manufacturing method of large-diameter high-grade steel-grade corrosion-resistant seamless pipe with a diameter of Φ219.0-460mm". This specification series uses a PQF rolling mill to directly obtain the final pipe, and there is a limit to the maximum specification range.

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  • Method for manufacturing large-aperture high-strength gathering and transportation seamless steel tube for environment with high content of hydrogen sulfide
  • Method for manufacturing large-aperture high-strength gathering and transportation seamless steel tube for environment with high content of hydrogen sulfide
  • Method for manufacturing large-aperture high-strength gathering and transportation seamless steel tube for environment with high content of hydrogen sulfide

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[0024] A method for manufacturing a large-diameter high-grade seamless gathering and transportation pipe for high-hydrogen-sulfide-containing environments of the present invention will be described in conjunction with the accompanying drawings and embodiments.

[0025] The present invention provides a method for manufacturing a large-caliber high-grade steel-grade seamless gathering pipe for an environment with high hydrogen sulfide content, the method comprising the following steps:

[0026] a. The steel type composition weight % of the large-diameter high-grade seamless gathering and transportation pipe for the high-hydrogen-sulfide-containing environment is: C0.05-0.13%, Si0.25-0.50%, Mn1.20-1.50%, P ≤0.015%, S≤0.003%, Al0.030~0.060%, N0.003~0.012%, Nb0.030~0.10%, V0.04~0.09%, Cu0.15~0.35%, Ni0.10~0.50% , Mo0.10~0.35%, Cr0.15~0.45%, Ca≤0.006%, CE ΠW ≤0.39%, CEpcm≤0.22%, the balance is Fe and unavoidable impurities;

[0027] b. Steelmaking is designed according to the comp...

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Abstract

The invention provides a method for manufacturing a large-aperture high-strength gathering and transportation seamless steel tube for the environment with the high content of hydrogen sulfide. The method includes the steps of steel type reasonable matching, steel making, PQF continuous rolling, 720EM skew rolling spin expanding and thermal refining and machining. The method has the advantages that by the utilization of contributions of residual elements to the performance, element control is reasonably adjusted, the gathering and transportation tube suitable for the environment with the high content of hydrogen sulfide is obtained through the rolling technology of skew rolling spin expanding and the special heat treatment technology, the requirement for strength under high gathering and transportation operating pressure is met, and the requirement of an acid environment for the hydrogen sulfide corrosion resistant performance is met. The steel tube has the good physical and chemical performance, is high in size accuracy of a tube body, convenient to apply, beneficial to ensuring safety of a delivery pipeline, and can be widely applied to acid oil and gas fields with the high content of hydrogen sulfide.

Description

technical field [0001] The invention relates to the field of corrosion-resistant materials and oil and gas transportation, in particular to a method for manufacturing large-diameter and high-strength gathering and transportation seamless steel pipes for environments with high hydrogen sulfide content. Background technique [0002] my country's oil and natural gas extraction volume is increasing year by year. Only Sinopec produces more than 7 billion cubic meters of natural gas per year. Among them, the high H2S gas fields include Sinopec Sichuan Puguang Gas Field, Yuanba Gas Field, PetroChina Luojiazhai Gas Field, etc. High-sulfur natural gas is highly corrosive, and the safe and reliable operation of the gathering and transportation system has very strict requirements on the performance of the gathering and transportation pipes. However, considering the large amount of pipelines used in the gathering and transportation system, relying entirely on imported pipe materials, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/48C21C7/00C21D8/10
Inventor 李艳许文妍李毅张旦天郑飞赵兴亮吕传涛赵春辉姚勇丁磊赵游云赵晓林李明志黄雪松
Owner TIANJIN PIPE (GROUP) CORP
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