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Titanium alloy pipe for petroleum and natural gas conveying and preparation method thereof

A technology of titanium alloy pipe and alloy ingot, which is applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of easy corrosion of pipeline steel pipes, blockage of oil pipelines, etc., and achieve the effect of solving wax deposition, prolonging service life and reducing losses

Active Publication Date: 2017-06-09
中世钛业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides a titanium alloy pipe for oil and gas transportation and its preparation method, which solves the problem of easy corrosion of existing pipeline steel pipes for oil and natural gas transportation and the clogging of oil pipelines caused by wax deposition on the inner wall of the pipe It prolongs the service life of the transmission pipeline and reduces the loss caused by maintenance and production stoppage. It is a new type of titanium alloy pipe with high strength, corrosion resistance and anti-wax deposition, and has a good application prospect.

Method used

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  • Titanium alloy pipe for petroleum and natural gas conveying and preparation method thereof
  • Titanium alloy pipe for petroleum and natural gas conveying and preparation method thereof
  • Titanium alloy pipe for petroleum and natural gas conveying and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Dosing according to the following components:

[0072] Al 0.1%; O 0.2%; the balance is Ti.

[0073] The specific preparation method is:

[0074]After batching, it is smelted in a vacuum consumable electrode electric arc furnace, and is cooled by cooling circulating water while melting to obtain an alloy ingot; the alloy ingot is forged into a rod, and then machined into a φ630mm smooth rod, and then its polished rod Put it into an electric heating furnace for heating, raise the temperature to 980°C, and keep it warm for 355 minutes. After the bar is out of the furnace, it is pierced with a cross-rolling piercer at a piercing speed of 15mm per second; into the soaking furnace and heated at 860°C for 15 minutes; after coming out of the furnace, it enters the hot rolling pipe mill with a rolling speed of 33mm / s; Outer diameter, the sizing rolling speed is 60mm per second, after sizing, it is sent to the heating furnace for annealing, kept at 720°C for 120min, and cooled ...

Embodiment 2

[0076] Dosing according to the following components:

[0077] Al 1.2%; O 0.27%; the balance is Ti.

[0078] The specific preparation method is:

[0079] After batching, it is smelted in a vacuum consumable electrode electric arc furnace, and is cooled by cooling circulating water while melting to obtain an alloy ingot; the alloy ingot is forged into a rod and then machined into a φ235mm smooth rod, and then its polished rod Put it into an electric heating furnace for heating, raise the temperature to 910°C, and keep it warm for 160 minutes. After the bar is out of the furnace, it is pierced with a cross-rolling piercer at a piercing speed of 23mm per second; into the soaking furnace and heated at 800°C for 20 minutes; after coming out of the furnace, it enters the hot rolling pipe mill with a rolling speed of 45mm / s; Outer diameter, the sizing rolling speed is 90mm per second, after sizing, it is sent to the heating furnace for annealing, kept at 650°C for 120min, and cooled...

Embodiment 3

[0081] Dosing according to the following components:

[0082] Al 2.4%; O 0.32%; the balance is Ti.

[0083] The specific preparation method is:

[0084] After batching, it is smelted in a vacuum consumable electrode electric arc furnace, and is cooled by cooling circulating water while melting to obtain an alloy ingot; after the alloy ingot is forged into a bar, it is machined into a φ105mm smooth rod, and then its polished rod Put it into an electric heating furnace for heating, raise the temperature to 960°C, and keep it warm for 110 minutes. After the bar is out of the furnace, it is pierced with a cross-rolling piercer at a piercing speed of 30mm per second; Send it into the soaking furnace and heat it at 780°C for 30 minutes; after it comes out of the furnace, it enters the hot rolling pipe mill with a rolling speed of 60mm / s; The outer diameter is determined, and the rolling speed of the sizing is 120mm per second. After the sizing, it is sent to the heating furnace fo...

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Abstract

The invention relates to a titanium alloy pipe for petroleum and natural gas conveying and a preparation method thereof. The titanium alloy pipe consists of the following components in percentage by mass: 0.1-2.4% of Al, 0.2-0.32% of O, Fe not more than 0.10%, C not more than 0.08%, N not more than 0.05%, H not more than 0.015%, and the balance of Ti. The titanium alloy pipe is prepared through such procedures as ingredient smelting, rod forging, hot perforation, hot rolling, hot sizing, hot straightening and surface sand blasting. The prepared titanium alloy pipe has the characteristic of resisting H2S and CO2 corrosion at 150 DEG C, solves the problem of easiness in corrosion of traditional pipeline steel pipes for petroleum and natural gas conveying, prolongs the service life of conveying pipelines, reaches the surface roughness of the inner and outer walls below 3.2 microns, solves the problem of blockage of petroleum conveying pipes caused by waxing on the inner walls of the pipes at the time of conveying petroleum, reduces the loss and the cost, and is excellent in application prospect.

Description

technical field [0001] The invention relates to the technical field of material processing, in particular to a titanium alloy pipe used for oil and gas transportation and a preparation method thereof. Background technique [0002] During oil and gas development, CO 2 、H 2 The corrosion of oil pipes by gases such as S has become the main corrosion problem in oil fields. With the increasing demand for oil and natural gas, the exploitation conditions of oil and gas wells are getting worse and more complex. Some H 2 S, CO 2 The successive development of oil and gas fields with high corrosive environment and harsh environment urgently requires the steel pipe manufacturing industry to develop and produce new oil and gas transmission pipes suitable for such acid service conditions. The use of alloy materials containing high Ni, Cr, Mo and other elements is an ideal material for acid corrosion resistance, but its high cost limits its wide use in the petroleum field. [0003] Mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C14/00C22F1/18B21C37/06F16L9/02
CPCB21C37/06C22C14/00C22F1/183F16L9/02
Inventor 张忠世郭淑君张政伟张桂艳莫喜刚于晓玲
Owner 中世钛业有限公司
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