Manufacturing method of submarine oil well valve base

A technology for subsea oil wells and manufacturing methods, which is applied to wellbore/well valve devices, earthwork drilling, wellbore/well parts, etc., and can solve the problem of small friction coefficient of chrome plating layer, low hardness of chrome plating layer, and easy fall off of chrome plating layer and other problems, to achieve good dispersion and coverage, to avoid quenching stress concentration cracks, to improve the effect of density and continuity

Active Publication Date: 2014-03-05
镇江市华阳机电制造有限公司
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The friction coefficient of the chrome-plated layer is small, especially the dry friction coefficient, which is the lowest among a

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a method for manufacturing a subsea oil well valve seat provided by the present invention. The chromium-molybdenum low-alloy steel is selected as the blank, and the component content of the chromium-molybdenum low-alloy steel includes the following components in mass percentages: carbon: 0.3%, Silicon: 0.18%, Manganese: 0.50%, Chromium: 0.90%, Molybdenum: 0.20%, Phosphorus: 0%, Sulfur: 0%, Hydrogen: 0ppm, Nickel: 0%, Vanadium: 0%, Copper: 0%, 0 % residual element, all the other are Fe, specifically comprise the following steps:

[0026] Step (1): Heat the billet to 880°C, upset the billet along the axial direction, air cool to 360°C and keep it warm for 420 minutes;

[0027] Step (2): reheat the billet in step (1) to 870°C, repeatedly upsetting along the two mutually perpendicular diameter directions of the cross section of the billet, and air-cool to 290°C for 180 minutes;

[0028] Step (3): Heat the billet in step (3) to 585°C, pull out the f...

Embodiment 2

[0037] This embodiment provides a method for manufacturing a subsea oil well valve seat. Chromium-molybdenum low-alloy steel is selected as the blank, and the component content of the chromium-molybdenum low-alloy steel includes the following components in mass percentages: carbon: 0.32%, silicon: 0.36% %, manganese: 0.70%, chromium: 1.10%, molybdenum: 0.30%, phosphorus: 0.02%, sulfur: 0.025%, hydrogen: 1.8ppm, nickel: 0.40%, vanadium: 0.03%, copper: 0.30%, 0.9% residual element, and the rest are Fe, which specifically includes the following steps:

[0038] Step (1): Heating the billet to 920°C, upsetting the billet in the axial direction, air cooling to 360°C and keeping it warm for 420 minutes;

[0039] Step (2): reheat the billet in step (1) to 890°C, repeatedly upsetting along the two mutually perpendicular diameter directions of the cross section of the billet, and air-cool to 310°C for 180 minutes;

[0040] Step (3): Heat the billet in step (3) to 615°C, pull out the fo...

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 a manufacturing method of a submarine oil well valve base. Chrome-molybdenum low-alloy steel is selected as a blank. The chrome-molybdenum low-alloy steel comprises the following components in percentage by mass: 0.3-0.32% of carbon, 0.18-0.36% of silicon, 0.50-0.70% of manganese, 0.90-1.10% of chrome, 0.20-0.30% of molybdenum, 0-0.02% of phosphorus, 0-0.025% of sulfur, 0-1.8ppm of hydrogen, 0-0.40% of nickel, 0-0.03% of vanadium, 0-0.30% of copper, 0-0.9% residual element and the balance of Fe. The manufacturing method disclosed by the invention can enhance the pressure resistance and toughness of the valve base and prevent the chrome coating from shedding.

Description

technical field [0001] The invention relates to a manufacturing method of a subsea oil well valve seat. Background technique [0002] Deep sea oil production has extremely strict requirements on the environment, because the rich mud, H 2 S and CO 2 Gas, and the working pressure is 35MPa~69MPa or even higher, and the temperature can reach minus 50 degrees Celsius. Although the AISI4130 (MOD) material is used, the deep-sea valve seat manufactured by the conventional forging manufacturing process is not only difficult to satisfy the process and quality, Low-temperature toughness is also difficult to meet, and it cannot be applied to harsh environments. [0003] Chromium is a kind of silver-white metal with microstrip blue, relative atomic mass is 51.99, density is 6.98-7.21g / cm3, melting point is 1875-1920℃, metal chromium is easily passivated in the air, and the surface forms An extremely thin passivation film, which exhibits the properties of noble metals. The chromium pl...

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
IPC IPC(8): C22C38/22C22C38/24C22C38/44C22C38/46C21D8/00C25D3/06E21B34/00
Inventor 陈雨民
Owner 镇江市华阳机电制造有限公司
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