A kind of rare earth-containing C110 steel grade petroleum casing and production method thereof

An oil casing and production method technology, applied in the field of metallurgical steel pipes, can solve the problems of short service life and low hydrogen sulfide corrosion resistance of oil casings, and achieve the effects of improving SSC resistance, improving SSC resistance, and reducing center porosity

Inactive Publication Date: 2020-11-24
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the petroleum casing in the prior art has low hydrogen sulfide corrosion resistance and short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046] Embodiment, preparation of rare earth-containing C110 steel grade petroleum casing

[0047] Use desulfurized molten iron that meets the requirements. Requirements for molten iron: P≤0.120%, S≤0.050%, and the quality of all alloys and raw materials must meet the standard requirements;

[0048] The single slag process is used for smelting, and the final slag basicity is controlled according to 3.2; silicon manganese, ferromanganese and ferrochrome alloy are used for deoxidation and alloying, and the final deoxidation adopts aluminum deoxidation process; During the process, add an appropriate amount of lime block (after the alloy is added);

[0049] When necessary, the molten steel is treated with slag removal, and argon is normally blown as required during the whole refining process; the method of gradually increasing the heating rate from low-level to high-level is adopted; slagging and desulfurization are carried out according to the composition and temperature of convert...

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Abstract

The invention discloses a C110 steel graded petroleum casing pipe containing rare earth. The petroleum casing pipe is prepared from the following components in percentage by weight: 0.27 to 0.30 percent of C, 0.15 to 0.30 percent of Si, 0.35 to 0.50 percent of Mn, 1.35 to 1.45 percent of Cr, 0.60 to 0.70 percent of Mo, 0.02 to 0.04 percent of V, 0.10 to 0.20 percent of Ni, 0.02 to 0.05 percent ofAl, 0.02 percent of Re, less than or equal to 0.020 percent of P and less than or equal to 0.005 percent of S. The invention further discloses a production method of the petroleum casing pipe. According to the petroleum casing pipe and the production method thereof, inner tissues of the petroleum casing pipe are uniform and chemical components are not segregated; the SSC resistance of the petroleum casing pipe is improved; the obtained petroleum casing pipe has good quality, the service life is prolonged, the transportation safety of a pipeline is increased and requirements on social development are easy to met.

Description

technical field [0001] The invention relates to the technical field of metallurgical steel pipes, in particular to a rare earth-containing C110 steel grade petroleum casing and a production method thereof. Background technique [0002] With the continuous and rapid development of society, the demand for energy such as oil and natural gas is increasing. The continuous growth of energy demand, structural adjustment and optimization have driven the overall development of the oil and gas industry. Petroleum transportation is often carried by pipelines. Pipeline transportation is an economical, safe and uninterrupted transportation method, which has the advantages of large transportation volume, low cost, high safety, convenience and high efficiency. In order to meet future oil and gas demand, H 2 Compared with the past, the development quantity of S oil and gas fields has increased greatly, and at the same time, the demand for pipeline steel for sour service has also increased...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/06C21D8/10
CPCC21D8/105C22C38/005C22C38/02C22C38/04C22C38/06C22C38/44C22C38/46
Inventor 郭智韬宋江波
Owner BAOTOU IRON & STEEL GRP
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