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High-steel-grade corrosion-resistant sleeve and preparation method thereof

A technology of anti-corrosion and casing, which is applied in the field of high-grade corrosion-resistant casing and its preparation, and can solve the problems of increasing product cost and final cost

Inactive Publication Date: 2018-04-13
JIANGSU CHANGBAO PLS STEEL TUBE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of oil and gas field users, this requires the adoption of larger borehole and casing strings to accommodate special C90 and T95 pipe strings, which increases the product cost and the final cost of the entire drilling and completion

Method used

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  • High-steel-grade corrosion-resistant sleeve and preparation method thereof
  • High-steel-grade corrosion-resistant sleeve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A high-grade steel-grade corrosion-resistant casing, which includes a pipe body, the components contained in the pipe body and the mass percentages of each component are as follows: C: 0.27%; Si: 0.15%; Mn: 0.55%; P: 0.005% ; S: 0.001%; ​​Cr: 0.45%; Ni: 0.05%; Cu: 0.05%; Mo: 0.82%; V: 0.05%; Nb: 0.02%; Al: 0.01%; Total: 100%.

[0031] The steps of the preparation method of the high-grade steel-grade corrosion-resistant sleeve include:

[0032] (1) Forming a tube billet: smelting through a converter according to the mass percentage ratio of each component and each component, and performing continuous casting and rolling of the molten steel after converter smelting to form a tube billet;

[0033] (2) Pipe billet sawing: the pipe billet is sawed and processed to form a plurality of divided pipe billets;

[0034] (3) Annular furnace heating: put the divided tube billet into the annular furnace for heating;

[0035] (4) Perforation: use a perforator to perforate the heat-...

Embodiment 2

[0049] A high-grade steel-grade corrosion-resistant casing, which includes a pipe body, the components contained in the pipe body and the mass percentages of each component are as follows: C: 0.32%; Si: 0.35%; Mn: 0.40%; P: 0.012% ; S: 0.003%; Cr: 0.60%; Ni: 0.10%; Cu: 0.10%; Mo: 0.92%; V: 0.09%; ; N: 0.008%; the rest is iron and unavoidable impurities, total: 100%.

[0050] The preparation method of the high-grade steel-grade corrosion-resistant casing of this embodiment is the same as that of Embodiment 1.

[0051] The dimensions of the prepared high-grade steel-grade corrosion-resistant casing are as follows: the outer diameter of the pipe body is between 199.8 mm and 202 mm; the ellipticity of the pipe body is 0.8 mm; the wall thickness of the pipe body ranges from 10.5 mm~10.8mm; the curvature of the pipe body is ≤1.2mm / m, and the chord height within 1.8m of the pipe end is ≤2.0mm, and the full-length chord height of the pipe body is ≤12.0mm, meeting the size requirement...

Embodiment 3

[0053] A high-grade steel-grade corrosion-resistant casing, which includes a pipe body, the components contained in the pipe body and the mass percentages of each component are as follows: C: 0.3%; Si: 0.25%; Mn: 0.5%; P: 0.006% ; S: 0.0015%; Cr: 0.5%; Ni: 0.05%; Cu: 0.05%; Mo: 0.86%; V: 0.07%; ; N: 0.004%; the rest is iron and unavoidable impurities, total: 100%.

[0054] The preparation method of the high-grade steel-grade corrosion-resistant casing of this embodiment is the same as that of Embodiment 1.

[0055] The dimensions of the prepared high-grade steel-grade corrosion-resistant casing are as follows: the outer diameter of the pipe body is between 201mm and 202mm; the ellipticity of the pipe body is 0.2mm; the wall thickness of the pipe body ranges from 10.8mm to 10.92mm; the curvature of the pipe body is ≤1.2mm / m, and the chord height within 1.8m of the pipe end is ≤2.0mm, and the full-length chord height of the pipe body is ≤12.0mm, meeting the size requirements. ...

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Abstract

The invention discloses a high-steel-grade corrosion-resistant sleeve and a preparation method thereof. The high-steel-grade corrosion-resistant sleeve comprises a sleeve body; the sleeve body comprises the following components of, by mass, 0.27%-0.32% of C, 0.15%-0.35% of Si, 0.40%-0.55% of Mn, 0-0.012% of P, 0-0.003% of S, 0.45%-0.60% of Cr, 0-0.10% of Ni, 0-0.10% of Cu, 0.82%-0.92% of Mo, 0.05%-0.09% of V, 0.02%-0.06% of Nb, 0.01-0.04% of Al, 0-0.002% of H, 0-0.004% of O, 0-0.008% of N, and the balance iron and unavoidable impurities, and the total mass is 100%. The high-steel-grade corrosion-resistant sleeve can reach the C110 steel grade, not only has good corrosion resistance, but also has good mechanical properties, and conforms to API standard requirements.

Description

technical field [0001] The invention relates to a high-grade steel corrosion-resistant casing and a preparation method thereof. Background technique [0002] At present, due to the slow progress of energy alternative technologies, the demand for oil and natural gas in countries around the world is still increasing. As the world's oil supply situation is becoming more and more severe, the price of petroleum products has risen, which has accelerated the worldwide demand for H 2 S and other oil and gas fields with high production cost and difficult development technology. In order to meet the needs of oilfield exploration and development, domestic and foreign oil well pipe backbone manufacturers have developed a wide variety of anti-H 2 S corroded oil casing products. [0003] According to relevant statistics, about 1 / 3 of the world's oil and gas fields are oil and gas fields containing hydrogen sulfide gas, while domestic oil and gas fields such as Southwest Oil and Gas Fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/06C21D8/10
CPCC22C38/02C21D8/105C22C38/001C22C38/002C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48
Inventor 张伟王国富苏郑卿戴敏明
Owner JIANGSU CHANGBAO PLS STEEL TUBE
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