Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High strength, high toughness, anti-CO 2 Preparation method of corroded casing

A high-toughness, high-strength technology, applied in the direction of casing, drill pipe, earthwork drilling, etc., can solve the problems of high alloy content, high cost, waste, etc., and achieve the effect of good quality, high production efficiency and low cost

Active Publication Date: 2016-09-07
INNER MONGOLIA BAOTOU STEEL UNION
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 1990s, foreign countries such as Japan and Argentina developed such products. After 2000, my country’s Baosteel and Tianjin Pipe Group successively developed such products. Most of the products are 9Cr and 13Cr. However, as we all know, 9Cr and 13Cr alloys The high content makes its cost higher. In some relatively barren oil fields, it is extravagant and wasteful to use 9Cr and 13Cr to resist carbon dioxide corrosion. Therefore, the development of economical carbon dioxide resistant oil casing has become a hot topic in this industry.

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
  • High strength, high toughness, anti-CO  <sub>2</sub> Preparation method of corroded casing
  • High strength, high toughness, anti-CO  <sub>2</sub> Preparation method of corroded casing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Starting from market demand, economic benefits and social benefits, the present invention designs a reasonable chemical composition through the effects of various elements in the material, and produces steel grades with a strength of up to 110psi and impact toughness through smelting and continuous casting, piercing and rolling, and quenching and tempering processes. Far higher than API 5CT standard requirements, and good corrosion resistance, high strength, high toughness and CO2 resistance 2 Corrosion casing. The high-strength, high-toughness anti-CO 2 The specific steps of the preparation method of the corrosion casing are as follows:

[0017] Step S1: Steelmaking production

[0018] Steelmaking production includes: hot metal pretreatment, converter smelting, LF refining, VD vacuum degassing and round billet continuous casting. Nitrogen fixation technology, deoxidation technology, and clean steel technology are used in the steelmaking production process to make bi...

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

PropertyMeasurementUnit
yield ratioaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-strength and high-toughness CO2 corrosion resistant bushing. The bushing comprises, by mass, 0.159-0.166% of C, 0.241-0.248% of Si, 0.427-0.574% of Mn, 2.92-3.1% of Cr, 0.373-0.417% of Mo, 0.015% or less of P, 0.011% or less of S, 0.05-0.052% of V, 0.013-0.18% of Ti, 0.018-0.022% of Al, and the balance Fe, and the sum of the mass fractions of the above components is 100%. The invention also discloses a making method of the high-strength and high-toughness CO2 corrosion resistant bushing. The method comprises the steps of steelmaking production, steel rolling and rolled steel heat treatment. The reasonability of the chemical components of the material of the bushing and the adoption of a crystal grain refinement and fine grain strengthening technology make the high-strength and high-toughness CO2 corrosion resistant bushing have a high CO2 corrosion resistance.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a high-strength, high-toughness anti-CO 2 Preparation method of corroded casing. Background technique [0002] During oil and gas drilling, CO in formation 2 It will cause serious corrosion to equipment such as oil pipes, casings, and pipelines. According to relevant data, CO 2 Corrosion is one of the important factors that threaten the safe production of oil and gas fields. Abroad, the Ekofisk oil field in Norway, the oil and gas fields in northern Germany, some oil and gas fields in the United States and Canada, the oil and gas fields in the Middle East, and the offshore oil fields in Southeast Asia all have CO 2 corrosion problem. Both onshore oilfields and offshore oilfields have occurred in China due to CO 2 Oil well shutdown and scrapping accidents caused by corrosion, economic losses and personnel safety are all seriously threatened. At present, my country's major oil ...

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 Patents(China)
IPC IPC(8): C22C38/28C22C33/04C21D8/10C21D1/18E21B17/00
Inventor 刘金石晓霞马爱清王金龙张行刚寇莎莎
Owner INNER MONGOLIA BAOTOU STEEL UNION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products