Production method of high H2S corrosion-resistant petroleum well casing pipe J55

A production method and oil well casing technology, applied in the field of metallurgy, can solve the problems of lack of experience in practical application, etc., and achieve the effects of inhibiting the corrosion rate of hydrogen sulfide, reducing band segregation, and improving the corrosion resistance of welding

Inactive Publication Date: 2018-12-18
HANDAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High Anti-H 2 S-corrosion oil casing J55 is perforated due to corrosion or rupture due to the pressure of the earth's crust. Due to the particularity of the use environment, very strict requirements are put forward for the steel composition design, smelting technology, rolling process and metallurgical equipment level. Requirements, the current domestic for the delivery of H 2 S oil casing, whether it is coil production or welded pipe manufacturing, lacks practical application experience

Method used

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  • Production method of high H2S corrosion-resistant petroleum well casing pipe J55

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Effect test

Embodiment 1

[0034] This embodiment is highly resistant to H 2 The production method of S-corrosion oil well casing J55 includes steelmaking, continuous casting, heating, rolling, coiling, uncoiling and pipe making. The thickness of the steel strip is 4.5mm. The specific process steps are as follows:

[0035] (1) Steelmaking process: molten steel gas TO: 0.0010%, [H]: 0.00012%, [N]: 0.0040%; refining Ca treatment process, adding pure calcium wire to adjust the Ca content in molten steel to 0.0045%, tapping steel P: 0.010%, S: 0.001% in water;

[0036] (2) Continuous casting process: The chemical composition of the continuous casting slab and its mass percentage are: C: 0.045%, Si: 0.16%, Mn: 1.30%, P: 0.010%, S: 0.001%, Als: 0.010% , Nb: 0.028%, Mo: 0.10%, Ti: 0.012%, Cr: 0.12%, the balance is Fe and unavoidable impurities;

[0037] (3) Heating process: the slab heating temperature is 1220℃, and the soaking time is 200min;

[0038] (4) Rolling process: rough rolling 3+5 passes, the final rolling ...

Embodiment 2

[0051] This embodiment is highly resistant to H 2 The production method of S-corrosion oil well casing J55 includes steelmaking, continuous casting, heating, rolling, coiling, uncoiling and pipe making. The thickness of the steel strip is 6.3mm. The specific process steps are as follows:

[0052] (1) Steelmaking process: molten steel gas TO: 0.0009%, [H]: 0.00011%, [N]: 0.0038%; refining Ca treatment process, adding pure calcium wire to adjust the Ca content in molten steel to 0.0040%, tapping steel P in water: 0.008%, S: 0.0009%;

[0053] (2) Continuous casting process: the chemical composition of the continuous casting slab and its mass percentage are: C: 0.055%, Si: 0.14%, Mn: 1.35%, P: 0.008%, S: 0.0009%, Als: 0.055% , Nb: 0.030%, Mo: 0.11%, Ti: 0.015%, Cr: 0.11%, the balance is Fe and unavoidable impurities;

[0054] (3) Heating process: the slab heating temperature is 1215℃, and the soaking time is 195min;

[0055] (4) Rolling process: rough rolling 3+5 passes, the final rollin...

Embodiment 3

[0068] This embodiment is highly resistant to H 2 The production method of S-corrosion oil well casing J55 includes steelmaking, continuous casting, heating, rolling, coiling, uncoiling and pipe making. The thickness of the steel strip is 7.8mm. The specific process steps are as follows:

[0069] (1) Steelmaking process: molten steel gas TO: 0.0011%, [H]: 0.00010%, [N]: 0.0042%; refining Ca treatment process, adding pure calcium wire to adjust the Ca content in molten steel to 0.0038%, tapping steel P: 0.009%, S: 0.001% in water;

[0070] (2) Continuous casting process: the chemical composition of the continuous casting slab and its mass percentage are: C: 0.061%, Si: 0.15%, Mn: 1.25%, P: 0.009%, S: 0.001%, Als: 0.025% , Nb: 0.028%, Mo: 0.10%, Ti: 0.013%, Cr: 0.12%, the balance is Fe and unavoidable impurities;

[0071] (3) Heating process: the slab heating temperature is 1218℃, and the soaking time is 215min;

[0072] (4) Rolling process: rough rolling 3+5 passes, the final rolling ...

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Abstract

The invention discloses a production method of a high H2S corrosion-resistant petroleum well casing pipe J55. The production method comprises the processes of steel making, continuous casting, heating, rolling, coiling, uncoiling, pipe making and heat treating. According to the production method of the high H2S corrosion-resistant petroleum well casing pipe J55, on the component design, low-content C, low-content P and low-content S are adopted to reduce banded segregation, and cracking and temper brittleness tendency are reduced; the low-temperature toughness and the welding corrosion resistance of steel are improved through low-content O, low-content N and low-content H; Nb, Cr and Mo are added to form a passivation film, hydrogen is prevented from entering the passivation film, and thenthe effect of effectively inhibiting the hydrogen sulfide corrosion rate is achieved; and a TMCP rolling technology is adopted and combined with a low-temperature rolling technology, therefore, it isguaranteed that austenite phase transformation is generated at low temperature, ultrafine ferrite structures are obtained, and then production of the high H2S corrosion-resistant petroleum well casing pipe J55 is achieved. According to the production method, the safety performance of the petroleum well casing pipe industry is greatly improved, and the production method has the characteristics ofbeing low in product cost, excellent in comprehensive performance and the like.

Description

Technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a production method of a petroleum oil well casing J55 with high resistance to H2S corrosion. Background technique [0002] With the rapid development of my country’s social economy, the demand for energy continues to increase, and the contradiction between energy supply and demand has become increasingly prominent. High-sulfur oil and natural gas containing acid media are also included in my country’s energy development schedule. Therefore, anti-corrosion used in acidic environments The demand for pipeline steel is growing rapidly. [0003] When the oil casing J55 is transporting sour oil and gas, the inside of the pipeline contacts H 2 S, CO 2 And Cl - . Hydrogen sulfide (H 2 S) is one of the most corrosive and harmful media in oil and natural gas. Its main forms of corrosion damage are hydrogen-induced cracking (HIC) and sulfide stress corrosion (SSCC). Hydrogen-induce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/26C22C38/22C22C38/28C21D8/02C21D9/50B23P15/00
CPCB23P15/00C21D8/0205C21D8/0226C21D9/50C22C38/02C22C38/04C22C38/06C22C38/22C22C38/26C22C38/28
Inventor 许斌李强王文录贾改风李冠楠李斌柳风林吉文文
Owner HANDAN IRON & STEEL GROUP
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