Unlock instant, AI-driven research and patent intelligence for your innovation.

Corrosion inhibitor for oil-gas field equipment corrosion resistance and preparation method thereof

A corrosion inhibitor, oil and gas field technology, applied in the corrosion inhibitor and its preparation, in the field of petroleum industry anticorrosion, to achieve the effects of improved polarization resistance, low cost and high corrosion inhibition rate

Inactive Publication Date: 2011-01-12
TIANJIN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]However, with the thickening of the anticorrosion layer of metal materials such as steel, deposits will appear, and the deposits will enter the compressor and other equipment to block the flow channel, and the It will bring great difficulties to production and maintenance

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
  • Corrosion inhibitor for oil-gas field equipment corrosion resistance and preparation method thereof
  • Corrosion inhibitor for oil-gas field equipment corrosion resistance and preparation method thereof
  • Corrosion inhibitor for oil-gas field equipment corrosion resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 4

[0037] Example 4 is the evaluation of the corrosion inhibition performance of the corrosion inhibitor by electrochemical method. The three-electrode system of A3 steel sample-platinum electrode-saturated potassium chloride electric shock was used to measure its electrochemical behavior in saturated hydrogen sulfide aqueous solution with and without the addition of corrosion inhibitor. The purity of industrial-grade pyridine is 50% to 60%, and it is rectified. Its main components are pyridine, pyridine, and quinoline derivatives.

example 1

[0039] Add distilled water to ferric sulfate until it is completely dissolved, then slowly add n-butylamine dropwise therein until a uniform and stable solution is formed, the mass ratio of ferric sulfate to n-butylammonium is 1:1; industrial grade pyridine (purity about 55 %) is placed in a rectifying device, the temperature is adjusted to 250 degrees Celsius, and the pyridine fraction is collected for subsequent use. N-butylammonium salt, pyridine, sodium molybdate and 95% ethanol are formulated as corrosion inhibitor according to 40%: 10%: 5%: 45%.

[0040] The test was carried out in a test tube filled with H 2 S saturated aqueous solution 10mL, put a 10×10×3 steel sheet sample prepared with A3 steel in each test tube, a total of 10, 5 of which add corrosion inhibitor (6-10 drops each), 5 as a blank sample. After the test tube is sealed, it is placed in a constant temperature water bath device at 50°C, and the test is carried out in a static state for 5 days. After takin...

example 2

[0042] Add distilled water to ferric sulfate until it is completely dissolved, then slowly add n-butylamine dropwise therein until a uniform and stable solution is formed, the mass ratio of ferric sulfate to n-butylammonium is 1:1; industrial grade pyridine (purity about 55 %) is placed in a rectifying device, the temperature is adjusted to 250 degrees Celsius, and the pyridine fraction is collected for subsequent use. n-Butyl ammonium salt, pyridine, sodium molybdate and 95% ethanol are formulated as corrosion inhibitor according to 30%: 20%: 5%: 45%.

[0043] The test was carried out in a 1L jar with 400mL of H2S aqueous solution inside, and a 10×10×3 steel sheet sample made of A3 steel was hung on the bracket so that it was above the liquid level in the bottle. There are two bottles in total, each with 5 tablets, one of which is added with corrosion inhibitor (corrosion inhibitor is placed in a small beaker, about 3ml, and then placed in a jar), and one is blank. Put the s...

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 relates to a corrosion inhibitor for oil-gas field equipment corrosion resistance and a preparation method thereof. The corrosion inhibitor comprises the following components in percentage by mass: 30-40% of inorganic acid ammonium salt, 10-20% of pyridine, 1-5% of corrosion inhibition assistant and 10-50% of solvent. The gas-liquid biphase test and the electrochemical test indicatethat the corrosion inhibitor has the effect of corrosion inhibition in sulphuric media. The invention has the advantages of low cost, simple operation, high inhibitor efficiency and other favorable experimental effects.

Description

Technical field: [0001] The invention relates to a corrosion inhibitor used for anticorrosion of steel equipment in oil and gas fields and a preparation method thereof, belonging to the anticorrosion technology of the petroleum industry. Background technique: [0002] Statistics show that corrosion loss is the first of all kinds of natural disasters. On the one hand, controlling and preventing corrosion can save a lot of resources, and at the same time save energy and manpower for the production of raw materials and equipment, which is of far-reaching significance. [0003] In the petroleum industry, many links such as oil and natural gas exploitation, refining, and transportation have the problem of steel equipment being corroded, and with the extension of oil and gas field exploitation time, more and more corrosive components in oil and gas wells make the equipment corrode. more serious. Severe corrosion causes equipment failure on the one hand, and the replacement of e...

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): C23F11/16
Inventor 韩烨崔振铎
Owner TIANJIN UNIV