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Light and pressure-proof fast-decomposed cast magnesium alloy

A technology for casting magnesium alloys and magnesium-aluminum alloys, which is applied in the field of casting magnesium alloys, can solve the problems of high activity, prolonging the construction period, and inability to carry out safe preparation, and achieves reasonable component distribution ratio, simple production process, and improved overall strength and reliability. The effect of decomposition performance

Active Publication Date: 2013-10-09
中山市宏镁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional method in the past is to discharge the pressure-holding ball back out of the wellhead under the action of low layer pressure, or use drilling tools to drill out the sliding sleeve ball seat and the pressure-holding ball. impact, it may cause the pressure ball to be stuck, and the reverse discharge is unsuccessful. Going into the drilling tool for milling will prolong the construction period and increase construction costs and risks
Lightweight metal materials mainly refer to density below 4.5g / cm 3 Materials, including aluminum and its alloys, magnesium and its alloys, titanium and its alloys, lithium and its alloys, we found in the previous research, aluminum and its alloys, titanium and its alloys in 93 ℃ 3% KCl solution The decomposition rate is lower than 1×10 -5 g.cm -2 .h -1 , unable to meet the decomposition performance requirements of the pressure-suffocating ball material in the multi-stage sliding sleeve staged fracturing technology (the decomposition rate of 3% KCl at 93°C is required to be greater than 0.02g.cm -2 .h -1 )
Lithium and its alloys cannot be effectively and safely prepared in an atmospheric environment due to their high activity and easy oxidation.

Method used

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  • Light and pressure-proof fast-decomposed cast magnesium alloy
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  • Light and pressure-proof fast-decomposed cast magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The composition and weight percentage of the alloy are:

[0035] 13%Al-2%Zn-0.1%Fe-5%Ni-2.5%Ag-0.5%Ti-0.5%Zr, the rest is Mg.

[0036] The preparation method is: first put pure magnesium and pure aluminum into the smelting furnace and raise the temperature to 700°C; after melting, bake the Al-Fe master alloy, Al-Ni master alloy, Al-Ag master alloy, Al- Put the Zr master alloy, Al-Ti master alloy and pure zinc into the magnesium-aluminum alloy melt, and raise the temperature to 740°C at the same time; after melting, when the temperature drops to 720°C, pass in argon gas for degassing treatment; cool down to 700°C, Stand still, cast under the protection of argon, and cool down.

Embodiment 2

[0038] The composition and weight percentage of the alloy are:

[0039] 15%Al-5%Zn-0.5%Fe-0.1%Ni-0.1%Ti-0.1%Zr, the rest is Mg.

[0040] The preparation method is: first put pure magnesium and pure aluminum into the smelting furnace, heat up to 730 ° C; after melting, bake the Al-Fe master alloy, Al-Ni master alloy, Al-Zr master alloy, Al- Put the Ti master alloy and pure zinc into the magnesium-aluminum alloy melt, and raise the temperature to 760°C at the same time; 6 Cast under the protection of mixed gas with air, and cool down.

Embodiment 3

[0042] The composition and weight percentage of the alloy are:

[0043] 20%Al-10%Zn-5%Fe-2.5%Ni-2.5%Cu-5%Ag-0.25%Ti-0.25%Zr, the rest is Mg.

[0044] The preparation method is: first put pure magnesium and pure aluminum into the smelting furnace and raise the temperature to 715°C; after melting, bake the Al-Fe master alloy, Al-Ni master alloy, Al-Cu master alloy, Al- Put the Ag master alloy, Al-Zr master alloy, Al-Ti master alloy and pure zinc into the magnesium-aluminum alloy melt, and raise the temperature to 780°C at the same time; 2 Cl 6 The refining agent is degassed; the temperature is lowered to 700°C, left standing, cast under the protection of argon, and cooled.

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Abstract

The invention discloses light and pressure-proof fast-decomposed cast magnesium alloy which can be used as a tripping ball material for a multi-stage sliding sleeve staged-fracturing technique. The light and pressure-proof fast-decomposed cast magnesium alloy is prepared from the following components: 13-25% of Al, 2-15% of Zn, 0.1-5% of Fe, 0.05-5% of Cu, 0.05-5% of Ni, 0-5% of Ag, 0.05-0.5% of Zr, 0.05-0.5% of Ti, and the balance of Mg. The preparation method comprises the following steps of: weighing the components according to the designed component ratio of the magnesium alloy; firstly, putting pure magnesium and pure aluminum into a smelting furnace, putting pure zinc and intermediate alloy of other components into magnesium-aluminum alloy melt after melting; refining, degassing, and stewing after warming to melt; then casting in a protective atmosphere. The light and pressure-proof fast-decomposed cast magnesium alloy is reasonable in component ratio, and simple in craft process; the light and pressure-proof fast-decomposed cast magnesium alloy can be obtained by controlling the ingredients of the alloy; the alloy decomposition performance exceeds that of the traditional cast magnesium alloy; the demands of the multi-stage sliding sleeve staged-fracturing technique on the decomposition performance of the tripping ball material can be met; industrialized application can be achieved; application of the magnesium alloy in the field of exploitation of petroleum and gas is expanded.

Description

technical field [0001] The invention discloses a light-weight, pressure-resistant and fast-decomposing cast magnesium alloy. It can be used as a pressure-suppressing ball material for multi-stage sliding sleeve segmental fracturing technology for oil and gas development. The invention belongs to the technical field of magnesium alloy preparation. Background technique [0002] Shale gas refers to unconventional natural gas that occurs in organic-rich mud shale and its interlayers, mainly in the state of adsorption or free, and is mainly composed of methane. It is a clean and efficient energy resource. In recent years, breakthroughs in shale gas exploration and development technologies in the United States have resulted in rapid growth in production, which has had a major impact on the international natural gas market and the world's energy structure. Major resource countries in the world have increased their efforts in shale gas exploration and development. Multi-stage slid...

Claims

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Application Information

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IPC IPC(8): C22C23/02C22C23/04C22C1/03
Inventor 肖代红李秀秀朱哲民
Owner 中山市宏镁科技有限公司
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