580Mpa-level aluminum alloy pipe for drill stem and manufacturing method thereof

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.
CN104532090AActive Publication Date: 2015-04-22BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BC P INC CHINA NAT PETROLEUM CORP
Publication Date
2015-04-22

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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.
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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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