High-strength heat-resistant oil casing material and preparation method thereof

A heat-resistant oil, high-strength technology, applied in heat treatment equipment, heat treatment furnaces, manufacturing tools, etc., can solve the problems of high temperature resistance mechanical properties and poor anti-collapse performance, achieve excellent anti-collapse performance, improve preparation methods, Effect of suppressing excessive grain refinement

Active Publication Date: 2020-12-29
DALIPAL PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of poor high-temperature-resistant mechanical properties and anti-collapse performance existing in heavy oil well production casings, the present invention provides a high-strength heat-resistant oil casing material and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The embodiment of the present invention provides a high-strength heat-resistant oil casing material, the chemical composition of which is:

[0028] C 0.30%, Si 0.15%, Mn 0.9%, Cr 1.1%, V 0.06%, Ti 0.01%, Al 0.008%, and the rest are Fe and unavoidable impurities.

[0029] The preparation steps of the above-mentioned high-strength heat-resistant oil casing material are as follows:

[0030] Using scrap steel as raw material, through 80t electric arc furnace melting, ladle refining and continuous casting process, the continuous casting round billet with the same chemical composition as the above-mentioned high-strength heat-resistant oil casing material is produced; the continuous casting round billet is heated and perforated by the ring furnace Made into capillary, the capillary is rolled to get a barren tube, and the barren tube is reheated in an intermediate frequency induction furnace, and the micro tension is reduced to obtain a rolled steel pipe with a nominal outer d...

Embodiment 2

[0040] The embodiment of the present invention provides a high-strength heat-resistant oil casing material, the chemical composition of which is:

[0041] C 0.25%, Si 0.35%, Mn 1.1%, Cr 1.0%, V 0.08%, Zr 0.01%, Ti 0.02%, Al 0.006%, and the rest are Fe and unavoidable impurities.

[0042] The preparation steps of the above-mentioned high-strength heat-resistant oil casing material are as follows:

[0043] Using scrap steel as raw material, through 80t electric arc furnace melting, ladle refining and continuous casting process, the continuous casting round billet with the same chemical composition as the above-mentioned high-strength heat-resistant oil casing material is produced; the continuous casting round billet is heated and perforated by the ring furnace Made into capillary, the capillary is rolled to get a barren tube, and the barren tube is reheated in an intermediate frequency induction furnace, and the micro tension is reduced to obtain a rolled steel pipe with a nomin...

Embodiment 3

[0053] The embodiment of the present invention provides a high-strength heat-resistant oil casing material, the chemical composition of which is:

[0054] C 0.28%, Si 0.25%, Mn 1.0%, Cr 0.9%, V 0.04%, Zr 0.03%, Ti 0.03%, Al 0.005%, and the rest are Fe and unavoidable impurities.

[0055] The preparation steps of the above-mentioned high-strength heat-resistant oil casing material are as follows:

[0056] Using scrap steel as raw material, through 80t electric arc furnace melting, ladle refining and continuous casting process, the continuous casting round billet with the same chemical composition as the above-mentioned high-strength heat-resistant oil casing material is produced; the continuous casting round billet is heated and perforated by the ring furnace Made into capillary, the capillary is rolled to get a barren tube, and the barren tube is reheated in an intermediate frequency induction furnace, and the micro tension is reduced to obtain a rolled steel pipe with a nomin...

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Abstract

The invention discloses a high-strength heat-resistant oil casing material and a preparation method thereof. The oil casing material comprises the following components of, in percentage by weight, greater than or equal to 0.25% and less than or equal to 0.30% of C, greater than or equal to 0.15% and less than or equal to 0.35% of Si, greater than or equal to 0.9% and less than or equal to 1.1% ofMn, greater than or equal to 0.9% and less than or equal to 1.1% of Cr, greater than or equal to 0.04% and less than or equal to 0.08% of V, greater than or equal to 0.01% and less than or equal to 0.03% of Ti, greater than or equal to 0.01% of Al and the balance Fe and inevitable impurities. The preparation method comprises the following steps that 0.01%-0.03% of Zr element can also be added intothe oil casing material provided by the invention, so that the heat resistance of the oil casing material can be further improved. The oil casing material disclosed by the invention is simple in component system, low in manufacturing cost and excellent in high-temperature mechanical property and collapse resistance, can be widely applied to drilling and production of heavy oil thermal productionwells, and has a wide market prospect.

Description

technical field [0001] The invention relates to the technical field of oil casing manufacturing, in particular to a high-strength heat-resistant oil casing material and a preparation method thereof. Background technique [0002] At present, heavy oil resources in the world are relatively abundant, accounting for about 70% of the world's remaining oil resources. my country is a major producer of heavy oil, and its heavy oil resources account for a considerable proportion. The development of heavy oil covers more than ten oil reservoir areas including Liaohe, Shengli, Xinjiang, and Henan. Heavy oil has high viscosity and poor fluidity. How to effectively exploit heavy oil has always been a difficult problem for the petroleum industry. Heavy oil is extremely sensitive to temperature, and the viscosity will drop by half for every 10°C increase. Therefore, the heavy oil steam flooding method (that is, injecting high-pressure and high-temperature steam into the oil well through p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/24C22C38/28C21D1/25C21D6/00C21D8/10C21D9/08C22C33/06
CPCC22C38/02C22C38/04C22C38/24C22C38/28C22C38/06C22C33/06C21D6/005C21D6/008C21D6/002C21D8/105C21D9/085C21D1/25C21D2211/009Y02P10/20
Inventor 邓叙燕
Owner DALIPAL PIPE
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