High-temperature oxygen corrosion resistant stainless steel, high-temperature oxygen corrosion resistant stainless steel casing pipe and manufacturing method of high-temperature oxygen corrosion resistant stainless steel casing pipe

A manufacturing method and oxygen corrosion technology, applied in the field of casing and its manufacturing, stainless steel, can solve the problem of not meeting the requirements of 500 ℃ fire flooding corrosion resistance and mechanical properties, etc.

Active Publication Date: 2019-03-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the technical solution disclosed in this patent document, its strength can meet the casing strength requirements for steam flooding at

Method used

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  • High-temperature oxygen corrosion resistant stainless steel, high-temperature oxygen corrosion resistant stainless steel casing pipe and manufacturing method of high-temperature oxygen corrosion resistant stainless steel casing pipe
  • High-temperature oxygen corrosion resistant stainless steel, high-temperature oxygen corrosion resistant stainless steel casing pipe and manufacturing method of high-temperature oxygen corrosion resistant stainless steel casing pipe
  • High-temperature oxygen corrosion resistant stainless steel, high-temperature oxygen corrosion resistant stainless steel casing pipe and manufacturing method of high-temperature oxygen corrosion resistant stainless steel casing pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-17 and comparative example 1-7

[0043] Table 1 lists the mass percentage of each chemical element in the high temperature oxygen corrosion resistant stainless steel of Examples 1-17 and the comparative steel of Comparative Examples 1-3.

[0044] Table 1. (wt%, the balance is Fe and other unavoidable impurity elements except P and S)

[0045]

[0046]

[0047] Note: The value of formula (1) in the table refers to the value calculated by (Cr+1 / 2W):(Ni+5C), where Cr, W, Ni, and C are the mass percentage content of each element.

[0048] The high temperature oxygen corrosion resistant stainless steel of Examples 1-17 and the comparison steel of Comparative Examples 1-7 are smelted, casted, rolled, rolled, sized, tempered, and the process parameters involved in the sizing step and the tempered step Listed in Table 2.

[0049] In the sizing step, control the final rolling temperature at 900-980°C, and then perform rapid cooling at a cooling rate of 15-40°C / s, control the final cooling temperature of rapid c...

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Abstract

The invention discloses high-temperature oxygen corrosion resistant stainless steel. The high-temperature oxygen corrosion resistant stainless steel is prepared from the following chemical elements inpercentage by mass: 0.04-0.10% of C, 0.1-0.5% of Si, 0.20-1.0% of Mn, 11.0-14.0% of Cr, 2.0-5.0% of Ni, no more than 0.02% of N, 0.2-1.0% of W, 0.03-0.1% of V, 0.01-0.04% of Al, and the balance of Feand other unavoidable impurities. The high-temperature oxygen corrosion resistant stainless steel is provided with a single tempering martensite structure, the surface of the high-temperature oxygencorrosion resistant stainless steel is provided with a passivation film, and the passivation film contains Cr and Ni. The invention further discloses a high-temperature oxygen corrosion resistant stainless steel casing pipe. The yield strength of the high-temperature oxygen corrosion resistant stainless steel casing pipe is the 90-110 ksi steel grade, the impact toughness of the high-temperature oxygen corrosion resistant stainless steel casing pipe is greater than or equal to 80 J, and the high-temperature oxygen corrosion resistant stainless steel casing pipe resists corrosion of co-existence of O2 and CO2 under the environment of 500 DEG C or above.

Description

technical field [0001] The invention relates to a stainless steel, a casing and a manufacturing method thereof, in particular to a high-temperature-resistant stainless steel, a casing and a manufacturing method thereof. Background technique [0002] Viscose oil is a relatively viscous oil. Because of its high viscosity, high density, and high flow resistance, it is difficult to flow into the wellbore from the oil layer, or lift from the wellbore to the ground. For the heavy oil in the oil layer, the thermal extraction method is adopted. In order to improve the recovery rate, a technology of burning the oil layer has been developed in recent years. The principle is to inject air, oxygen or oxygen-enriched gas into the downhole, and rely on spontaneous combustion or use the downhole ignition device to ignite Combustion makes it react with organic fuel (crude oil) in the oil reservoir, and unburned heavy oil is exploited with the help of the generated heat. The application of...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/06C21D1/25C21D8/10C21D9/08
CPCC21D1/25C21D8/105C21D9/085C21D2211/008C22C38/001C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46
Inventor 张春霞齐亚猛张忠铧蔡海燕
Owner BAOSHAN IRON & STEEL CO LTD
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