Copper-based memory alloy mended and patched pipe as well as preparation method, mending and patching method and application thereof

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 high cost, easy corrosion, poor thermoelastic phase transition performance, etc., and achieve low cost, simple and good subsidy process Effect of thermoelastic phase transition properties

Inactive Publication Date: 2015-08-12
无锡源创机械科技有限公司
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  • Summary
  • 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 o

Method used

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  • Copper-based memory alloy mended and patched pipe as well as preparation method, mending and patching method and application thereof
  • Copper-based memory alloy mended and patched pipe as well as preparation method, mending and patching method and application thereof
  • Copper-based memory alloy mended and patched pipe as well as preparation method, mending and patching method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Embodiment 1: the preparation of subsidy tube

[0079] According to the winter construction conditions in Northeast and Northwest regions, the temperature Ms at which martensitic transformation begins is required to be -20 to -30°C.

[0080] (1) Design alloy composition

[0081] According to the formula Ms (°C)=635-43×Al (mass percentage)-302×Be (mass percentage)-18×Mn (mass percentage)-8×Ga (mass percentage), the mass percentage of each element is calculated as Al: 11%, Be: 0.45%, Mn: 3%, Ga: 0.5%, and the balance is Cu. The calculated Ms(°C) is -27.9°C, which is within the required range; the measured As is 10°C, and the Af is 20-30°C, and the estimated Ms(°C) is approximately -30°C.

[0082](2) According to the designed alloy composition, metal Cu, metal Al, metal Mn, metal Be and metal Ga are added to the argon melting furnace, first vacuumed to 4-5Pa and then filled with argon until the gauge pressure is -0.06MPa, and smelted After heat preservation, it is direc...

Embodiment 2

[0084] Embodiment 2: the preparation of subsidy tube

[0085] (1) The alloy composition is designed according to the formula, and the mass percentage of each element is Al: 10%, Be: 0.3%, Mn: 2%, Ga: 0.1%, and the balance is Cu.

[0086] (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 5Pa, and the melting temperature is 1180°C. Cast in high-strength directional solidification equipment into an oxygen-free short thick ingot with a columnar crystal structure, with a diameter of 100mm and a length of about 50mm.

[0087] (3) Thermomechanical treatment: Homogenize the short and thick ingot obtained in step (2) at 840°C for 12 hours and then water-cool to homogenize the alloy composition; then clean it and forge it, the initial rolling temperature is 840°C, The termination temperature is 620°C, and the expansion assembly 100 is obtained; the expansion asse...

Embodiment 3

[0088] Embodiment 3: the preparation of subsidy tube

[0089] Step (1) Design the alloy composition, the mass percentage of each element is the same as in Example 1.

[0090] Adopt vacuum melting in step (2), its vacuum degree is 1Pa, and melting temperature is 1220 ℃, and other steps are all the same as in embodiment 1, and its diameter of obtained ingot is 200mm, is about 200mm long.

[0091] (3) Thermomechanical treatment: the homogenization temperature is 860°C, and the homogenization time is 24h; the initial rolling temperature of hot forging is 820°C, and the termination temperature is 600°C; the setting treatment temperature is 820°C, and the time is 1mm. ; Except that the vacancy treatment temperature is 100° C. and the time is 60 min, other steps are the same as in Example 1. The obtained subsidized pipe has a length of 1-1.3 m and an elastic deformation of 6%.

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Abstract

The invention provides a copper-based memory alloy mended and patched pipe as well as a preparation method, mending and patching method and application thereof. A copper-based memory alloy comprises the following elements by mass percent: 0.2-1.6% of Be, 6-14% of Al, 1-10% of Mn, 0-3% (more than 0) of Ga, 0-0.1% of impurities and the balance of Cu. The mended and patched pipe is formed by connecting an expansion component with connecting pipes, wherein the expansion component comprises an expanded cylinder, a conical connector and an internally threaded cylinder, which are connected with each other in sequence. The preparation method comprises the following steps: weighing the raw materials according to the alloy components, smelting the raw materials and then cooling the product in a directional solidification cooling system to prepare a cast ingot; then carrying out thermal mechanical treatment, thus obtaining the mended and patched pipe. The mended and patched pipe is simple in mending and patching process and can be in powerful interference fit with a casing to be mended and patched, thus generating great sealing pressure and friction between the mended and patched pipe and the casing and preventing oil leak and fall.

Description

technical field [0001] The invention belongs to the technical field of new materials and oil delivery equipment, and relates to a subsidized pipe and its preparation method, subsidized method and application, in particular to a copper-based memory alloy subsidized pipe, its preparation method, subsidized 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 ...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/02C22F1/08E21B29/10
Inventor 唐嘉辉
Owner 无锡源创机械科技有限公司
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