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A copper-based memory alloy subsidized tube and its preparation method, subsidized method and use

A technology of memory alloy and subsidized pipe, which is applied in the direction of earthwork drilling and production, wellbore/well parts, etc., can solve the problems of easy corrosion, high cost, poor thermoelastic phase transition performance, etc., and achieve good thermoelastic phase transition performance and low cost The effect of low cost and simple subsidy process

Inactive Publication Date: 2017-11-07
无锡源创机械科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor thermoelastic phase transition performance, easy corrosion, difficult production, complicated processing technology and high cost of subsidy materials in the above-mentioned prior art, the present invention provides a copper-based memory alloy subsidy tube and its preparation method, subsidy method and application

Method used

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  • A copper-based memory alloy subsidized tube and its preparation method, subsidized method and use
  • A copper-based memory alloy subsidized tube and its preparation method, subsidized method and use
  • A copper-based memory alloy subsidized tube and its preparation method, subsidized method and use

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Experimental program
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Embodiment 1

[0080] Embodiment 1: the preparation of subsidy tube

[0081] According to the Sichuan area with high average temperature all year round and the conditions of high oilfield temperature in summer, it is required that the temperature Ms at which martensite transformation begins is -10°C, and the temperature at which martensite reverse transformation begins As is 40-50°C. The temperature Af at which the bulk inversion is terminated is 60-100°C.

[0082] (1) Design alloy composition: Al: 11%, Be: 0.38%, Mn: 3%, Ga: 1%, and the balance is Cu. The calculated Ms(°C) is -2.67°C, the measured As is 40-50°C, and the Af is 70-95°C, meeting the requirements.

[0083] (2) Add metal Cu, metal Al, metal Mn, metal Be and metal Ga into a vacuum melting furnace for vacuum melting according to the designed alloy composition. The vacuum degree is 10 Pa, and the melting temperature is 1180 ° C. In the high-strength directional solidification cooling equipment, it is poured into an oxygen-free sh...

Embodiment 2

[0085] Embodiment 2: the preparation of subsidy pipe

[0086] (1) The composition of the alloy is designed, and the mass percentage of the contained metal elements is obtained as follows: Al: 10%, Be: 0.3%, Mn: 2%, Ga: 0.1%, and the balance is Cu.

[0087] (2) Except that the degree of vacuum is 1 Pa, the melting temperature is 1100° C., and other steps are the same as step (2) in Example 1. The obtained ingot has a diameter of 150 mm and a length of about 100 mm.

[0088] (3) Thermomechanical treatment: In addition to the homogenization treatment temperature is 850 ° C, the homogenization time is 12 hours; the initial rolling temperature of hot forging is 840 ° C, the termination temperature is 620 ° C; the hot rolling temperature is 750 ° C; reverse extrusion at 830 ° C Press into a thin-walled tube with a diameter of 200mm, a wall thickness of 4mm, and a length of 3m; the setting temperature is 800°C, the setting time is 1mm, and the effective thickness is kept for 360s; ex...

Embodiment 3

[0089] Embodiment 3: the preparation of subsidy tube

[0090] (1) Design the alloy composition to obtain the mass percentage of the contained metal elements: Al: 12%, Be: 0.6%, Mn: 4%, Ga: 1%, and the balance is Cu.

[0091] (2) Except that the degree of vacuum is 8Pa, the melting temperature is 1220° C., other steps are the same as step (2) in Example 8, and the obtained ingot has a diameter of 100 mm and a length of about 50 mm.

[0092] (3) Thermomechanical treatment: In addition to the homogenization treatment temperature is 860 ° C, the homogenization time is 24 hours; the initial rolling temperature of hot forging is 820 ° C, the termination temperature is 600 ° C; the hot rolling temperature is 840 ° C; reverse extrusion at 820 ° C Press into a thin-walled tube with a diameter of 80mm, a wall thickness of 3.5mm, and a length of 1m; the setting temperature is 820°C, the setting time is 1mm, and the effective thickness is kept for 60s; except that the vacancy treatment te...

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Abstract

The invention provides a copper-based memory alloy subsidized pipe and its preparation method, subsidized method and application. The copper-based memory alloy includes the following elements in terms of mass percentage: Be: 0.2-1.6%, Al: 6-14%, Mn: 1-10%, Ga: 0-3% and 0 is not included, and impurities: 0-10%. 0.1%, the balance is Cu. The subsidized pipe is an alloy pipe with a wall thickness of 2.5-3.5mm, and its outer diameter is 3-4mm larger than the inner diameter of the bushing to be subsidized, and it can be pushed into a flower-shaped pipe in a working fluid of ≤0°C. The preparation method is as follows: taking raw materials according to the alloy composition and melting them, then cooling in a directional solidification cooling system to obtain ingots, and then performing thermomechanical treatment to obtain subsidized pipes. The subsidized pipe has a simple subsidizing process, and it can generate a strong interference fit with the casing to be subsidized, thereby generating a large sealing pressure and friction with the casing to prevent oil leakage and falling.

Description

technical field [0001] The invention belongs to the technical field of new materials and oil transportation equipment, and relates to a subsidy pipe and its preparation method, subsidy method and application, in particular to a copper-based memory alloy subsidy pipe, its preparation method, subsidy method and application. Background technique [0002] In industrial production, a large number of oilfield casings, chemical containers, pipelines and waterways will fail due to local rupture and leakage due to corrosion and geological changes, which have caused significant social and economic losses. 10% of the oil wells in the oil field need to be repaired every year. There are millions of wells in China and hundreds of millions of wells in the world. This involves hundreds of billions of dollars in the market. technical and economic significance. [0003] The earlier subsidy technology mainly used seam corrugated pipe subsidy technology, and the latest technology in the past t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/02E21B29/10
Inventor 唐嘉辉
Owner 无锡源创机械科技有限公司
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