A kind of high-strength anti-corrosion stainless steel, oil casing and manufacturing method thereof

A manufacturing method and anti-corrosion technology, applied in the direction of casing, manufacturing tools, drill pipes, etc., can solve problems such as unsatisfactory service safety, and achieve good anti-acidification liquid corrosion performance, excellent anti-corrosion performance, excellent anti-corrosion performance Effect

Active Publication Date: 2018-12-07
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The steel grades mentioned in the patent cannot meet the requirements of H 2 Requirements for safe service in an environment with S partial pressure above 0.1MPa

Method used

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  • A kind of high-strength anti-corrosion stainless steel, oil casing and manufacturing method thereof
  • A kind of high-strength anti-corrosion stainless steel, oil casing and manufacturing method thereof
  • A kind of high-strength anti-corrosion stainless steel, oil casing and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1-A7 and comparative example B1-B2

[0064] The oil-casing pipes in the above-mentioned embodiments and comparative examples are manufactured through the following steps (Table 2 shows the specific process parameters of each embodiment and comparative examples):

[0065] (1) Smelting and preparing the tube billet: In the smelting process, the electric arc furnace or converter + secondary refining process is used to control the mass percentage of each chemical element as shown in Table 1; then, continuous casting or die casting + forging is adopted The tube blank is made by the way;

[0066] (2) Heating the tube billet: the tube billet is heated above the austenitizing temperature by using a ring heating furnace;

[0067] (3) Tube making: tube making by perforation + hot rolling or hot extrusion;

[0068] (4) Solution heat treatment: the solution temperature is 980-1200°C, and then cooled to below 300°C at a rate of 15-25°C / S, so that the microstructure in the oil casing can be transformed into a single solid sol...

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Abstract

The invention discloses high-strength and anti-corrosion stainless steel. The high-strength and anti-corrosion stainless steel comprises chemical elements including, by mass percent, smaller than or equal to 0.1% of C, 0.1%-0.5% of Si, 0.1%-5% of Mn, 21.0%-23.5% of Cr, 21.5%-25.5% of Ni, 0.1%-5% of Mo, 0.01%-0.10% of Al, 0.01%-2.00% of W, 0.05%-0.10% of RE, 0.01%-0.3% of N, larger than 0% and smaller than or equal to 4.0% of Cu, larger than 0% and smaller than or equal to 2.0% of Co, and the balance Fe and other inevitable impurities. The high-strength and anti-corrosion stainless steel has good H2S and CO2 corrosion resisting performance and acidizing fluid corrosion resisting performance.

Description

technical field [0001] The invention relates to a steel material and a manufacturing method thereof, in particular to a stainless steel oil casing and a manufacturing method thereof. Background technique [0002] The oil pipe is a pipeline used to transport oil or natural gas from the reservoir to the ground in the process of oil and natural gas exploitation. The casing is set outside the oil pipe, which can support the formation to protect the oil pipe. Since oil reservoirs often contain high concentrations of H 2 S, CO 2 , in the actual application process, in addition to requiring the oil pipe and casing to have corresponding strength and impact performance, it is also required to have a certain resistance to H 2 S / CO 2 corrosion performance. With the continuous exploitation of highly corrosive oil and gas fields in recent years, the anti-H 2 S, CO 2 Corrosion performance has higher requirements. [0003] The publication number is CN101815802A, and the publication ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/44C21D9/08E21B17/00
Inventor 杨建强张忠铧齐亚猛熊文兵
Owner BAOSHAN IRON & STEEL CO LTD
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