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A 580MPa grade aluminum alloy drill pipe body and its manufacturing method

A 580mpa, aluminum alloy technology, used in the field of oil well pipe manufacturing, can solve problems such as insufficient strength of pipes, and achieve the effects of improving strength and repeated loading resistance, improving thermal strength, and improving high temperature resistance.

Active Publication Date: 2017-01-25
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing aluminum alloy drill pipe standard ISO15546-2011 lists the pipe used to manufacture ultra-high strength aluminum alloy drill pipe as 1953T1, but the strength of the pipe is insufficient. Therefore, in order to meet the needs of different geological conditions and make up for the strength of the 1953T1 pipe Insufficient, the development of higher strength 580MPa ultra-high strength aluminum alloy drill pipe pipe is of great significance

Method used

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  • A 580MPa grade aluminum alloy drill pipe body and its manufacturing method
  • A 580MPa grade aluminum alloy drill pipe body and its manufacturing method
  • A 580MPa grade aluminum alloy drill pipe body and its manufacturing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The chemical composition of the 580MPa aluminum alloy drill pipe body is by weight percentage: Zn 6.3%, Mg 2.1%, Cu 2.3%, Fe 0.3%, Ni 0.3%, Zr 0.2%, Ti 0.02%, the balance For Al and unavoidable impurities.

[0038]The preparation method of the pipe body for 580MPa grade aluminum alloy drill pipe, the above raw materials are smelted and cast to obtain the tube blank, and under the condition of heating rate of 10°C / min, the tube blank is subjected to 380°C×8h+420°C×12h+460°C× Homogenize for 32 hours, cool down to room temperature naturally, then hold at 420°C for 20 minutes, then extrude and deform, the extrusion ratio is greater than 18, and the extrusion speed is 3mm / s; then it is solid solution quenched at 455°C×2h+470°C×1h After treatment, spray water to cool, cool to room temperature at a cooling rate of 30°C / s, and then apply 2% pre-stretch deformation to the pipe body after solution quenching, and then perform artificial aging treatment at 120°C for 36h.

[0039] ...

Embodiment 2

[0041] The chemical composition of the 580MPa grade aluminum alloy drill pipe body is by weight percentage: Zn 6.8%, Mg 2.2%, Cu 2.5%, Fe 0.3%, Ni 0.2%, Zr 0.2%, Ti 0.02%, the balance For Al and unavoidable impurities.

[0042] The preparation method of the pipe body for 580MPa grade aluminum alloy drill pipe, the above raw materials are smelted and cast to obtain the tube blank, and under the condition of heating rate of 10°C / min, the tube blank is subjected to 380°C×8h+420°C×12h+460°C× Homogenize for 32 hours, cool down to room temperature naturally, then hold at 420°C for 20 minutes, then extrude and deform, the extrusion ratio is greater than 18, and the extrusion speed is 3mm / s; then it is solid solution quenched at 455°C×2h+470°C×1h After treatment, spray water to cool, cool to room temperature at a cooling rate of 30°C / s, and then apply 2% pre-stretch deformation to the pipe body after solution quenching, and then perform artificial aging treatment at 120°C for 12h.

...

Embodiment 3

[0045] The chemical composition of the 580MPa grade aluminum alloy drill pipe body is by weight percentage: Zn 7.3%, Mg 2.3%, Cu 2.3%, Fe 0.3%, Ni 0.3%, Zr 0.2%, Ti 0.02%, the balance For Al and unavoidable impurities.

[0046] The preparation method of the pipe body for 580MPa grade aluminum alloy drill pipe, the above raw materials are smelted and cast to obtain the tube blank, and under the condition of heating rate of 10°C / min, the tube blank is subjected to 380°C×8h+420°C×12h+460°C× Homogenize for 32 hours, cool down to room temperature naturally, then hold at 420°C for 20 minutes, then extrude and deform, the extrusion ratio is greater than 18, and the extrusion speed is 3mm / s; then it is solid solution quenched at 455°C×2h+470°C×1h After treatment, spray water to cool, cool to room temperature at a cooling rate of 30°C / s, and then apply 2% pre-stretch deformation to the pipe body after solution quenching, and then perform artificial aging treatment at 120°C for 48h.

...

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Abstract

The invention discloses a 580Mpa-level aluminum alloy pipe for a drill stem and a manufacturing method of the 580Mpa-level aluminum alloy pipe for the drill stem. The 580Mpa-level aluminum alloy pipe for the drill stem comprises, by weight, 6.0-7.5 percent of Zn, 1.7-2.3 percent of Mg, 1.7-2.6 percent of Cu, 0.1-0.3 percent of Fe, 0.1-0.3 percent of Ni, 0.1-0.2 percent of Zr, 0.01-0.02 percent of Ti and the balance Al and inevitable impurities. The manufacturing method of the 580Mpa-level aluminum alloy pipe for the drill stem comprises the steps of smelting, casting, pipe blank homogenizing treatment, pipe blank reheating, squeezing, solid dissolving, prestretching deformation and ageing. By the adoption of the 580Mpa-level aluminum alloy pipe for the drill stem, the strength is improved, the pipe has good plasticity, good toughness, good corrosion resistance and good fatigue resistance, and the tensile property and the ductility of the pipe both reach ISO specifications.

Description

technical field [0001] The invention belongs to the technical field of oil well pipe manufacturing, and relates to a pipe material for an aluminum alloy drill pipe, in particular to a pipe body for a 580MPa grade aluminum alloy drill pipe and a manufacturing method thereof. Background technique [0002] Petroleum drill pipe is the main tool used to transport mud and transmit power. The amount of drill pipe in the entire drill string accounts for more than 85%, and it is the main tool in drilling. Compared with the traditional steel-cobalt drill pipe, the aluminum alloy drill pipe has excellent characteristics such as low density, light weight, corrosion resistance, and non-magnetism, so that it can significantly improve the drilling depth, drilling speed and drilling efficiency in practical applications. transportation. Especially in some deep wells, ultra-deep wells, directional wells, acid gas wells (containing H 2 S and CO 2 ) and deep sea drilling have unique advantag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22F1/053
CPCC22C21/10C22F1/053
Inventor 冯春刘永刚韩礼红冯耀荣刘会群
Owner BC P INC CHINA NAT PETROLEUM CORP
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