Rare-earth-containing low-carbon high-alloy anticorrosion oil casing steel and preparation process thereof

A preparation process and a technology for corrosion oil, applied in the metallurgical field, can solve the problems of low economic benefit and investment ratio, insufficient anti-SSC performance, large one-time investment, etc., and achieve the effects of good economic benefit, good promotion value and good quality.

Inactive Publication Date: 2019-07-12
BAOTOU IRON & STEEL GRP
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high long-term investment of corrosion inhibitors and the hidden dangers of local corrosion caused by damage to the coating layer during use, the safest protective measure is to use corrosion-resistant materials, so 13Cr and super 13Cr are widely used in corrosion control However, the one-time investment of 13Cr is too large, and the oil and gas fields with low production have defects such as economic benefits and low investment ratio, and the SSC resistance of 13Cr materials in H2S-containing corrosive media still has great shortcomings.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rare-earth-containing low-carbon high-alloy anticorrosion oil casing steel and preparation process thereof
  • Rare-earth-containing low-carbon high-alloy anticorrosion oil casing steel and preparation process thereof
  • Rare-earth-containing low-carbon high-alloy anticorrosion oil casing steel and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The manufacturing process of the material is: electric furnace smelting→alloy addition→rare earth treatment→blank casting. The chemical composition of each example is shown in Table 1.

[0017] Each embodiment composition of table 1 (mass percentage / %)

[0018]

[0019] Table 2 five harmful elements and gas content (ppm)

[0020]

[0021] The rolling process is: billet→heating→rolling→slow cooling. The starting temperature of the round billet rolling is 1200-1250°C; the final rolling temperature is above 930°C.

[0022] The heat treatment process is: quenching + tempering, the quenching temperature is 1030°C ± 10°C, and the heat preservation is 70-80 minutes; the tempering temperature is 740°C ± 10°C, and the heat preservation is 90-100 minutes.

[0023] The metallographic structure inspection results after heat treatment are shown in Table 3, and the mechanical properties after heat treatment are shown in Table 4.

[0024] Metallographic structure of each embo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses rare-earth-containing low-carbon high-alloy anticorrosion oil casing steel comprising the following chemical components of, by mass, 0.08%-0.12% of C, 0.15%-0.28% of Si, 0.40%-0.60% of Mn, 1.8%-2.2% of Cr, 0.35%-0.45% of Mo, 0-0.02% of P, 0-0.015% of S, 0.05%-0.07% of V, 0.015%-0.025% of Al and 0.01%-0.02% of RE. A preparation process of the rare-earth-containing low-carbonhigh-alloy anticorrosion oil casing steel is further disclosed. The invention provides a chemical component design method of the high-strength high-toughness H2S / CO2-corrosion-resistant steel for anoil casing, and the material has high hydrogen sulfide corrosion resistance and a match between high strength and high toughness with the reasonable chemical components.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a rare earth-containing low-carbon high alloy 80psi anti-H 2 S / CO 2 Preparation process of corroded oil well pipe. Background technique [0002] h 2 S / CO 2 Corrosion is a common type of corrosion in the world's oil and gas industry, and it is also an important research topic in the field of corrosion and protection. With the CO 2 Corrosion and H 2 The gradual and in-depth study of S corrosion and the gradual solution of corrosion problems in engineering CO 2 and H 2 Corrosion under the coexistence of S has become quite prominent, and the corresponding research on corrosion materials is on the agenda. for H 2 S / CO 2 The protective measures taken for corrosion mainly include the use of corrosion-resistant materials, the addition of corrosion inhibitors and the use of anti-corrosion coatings. However, due to the high long-term investment of corrosion inhibitors and the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/24C22C38/06C21D8/10C21D1/18
CPCC21D1/18C21D8/105C22C38/005C22C38/02C22C38/04C22C38/06C22C38/22C22C38/24
Inventor 石晓霞李晓任慧平涛雅张行刚姜海龙孙浩詹飞郭志文温慧
Owner BAOTOU IRON & STEEL GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap