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High-strength rapid-decomposition magnesium alloy for oil exploitation tripping ball and preparation method

A technology of magnesium alloy and pressure ball, which is applied in the field of magnesium alloy materials, can solve problems such as backflow or grinding and pressure ball, and achieve the effect of improving strength

Active Publication Date: 2018-01-16
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies in the existing technology and solve the technical problem of flowback or milling pressure balls in staged fracturing in the prior art, the pressure balls can not only withstand the high pressure of fracturing construction and the high temperature at the bottom of the well, but also It can be quickly decomposed by itself in the fluid environment in the well. The invention provides a high-strength and fast-decomposing magnesium alloy for preparing pressure-suppressing balls for petroleum development and a preparation method

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Embodiment 1

[0017] The high-strength and fast-decomposing magnesium alloy is used to prepare the petroleum oil. Its raw material composition and weight percentage content are: 3% Al, 5% Zn, 5% Cu, and the remaining part is Mg and inevitable impurity elements.

[0018] The preparation method of the high-strength and rapid decomposition of magnesium alloy by holding the pressure ball for the preparation of petroleum: first heat the crucible to dark red (about 450°C), put pure magnesium and pure aluminum into the crucible of the melting furnace, and at the same time pass the protective atmosphere; After the temperature of the crucible is raised to 720℃ and the charge is completely melted, add the remaining metal, stir for two minutes and keep it warm for 15 minutes; then keep the preset time to remove the surface oxides, and pour it into an iron model preheated at 250℃. It should be stable at the time.

Embodiment 2

[0020] The high-strength and fast-decomposing magnesium alloy using squeezing ball is used to prepare petroleum. The preferred raw material composition and weight percentage content are: 6% Al, 2% Zn, 3% Cu, 5% Ni, and the remainder is Mg and inevitable impurities element.

[0021] The preparation method of the high-strength and rapid decomposition of magnesium alloy by holding the pressure ball for the preparation of petroleum: first heat the crucible to dark red (about 450°C), put pure magnesium and pure aluminum into the crucible of the melting furnace, and at the same time pass the protective atmosphere; After the temperature of the crucible is raised to 720℃ and the charge is completely melted, add the remaining metal, stir for two minutes and keep it warm for 15 minutes; then keep the preset time to remove the surface oxides, and pour it into an iron model preheated at 250℃. It should be stable at the time.

Embodiment 3

[0023] The high-strength and fast-decomposing magnesium alloy with squeezing ball is used to prepare petroleum. Its raw material composition and its weight percentage content are: 8% Al, 3% Zn, 3% Cu, 3% Ni, and the remainder is Mg and inevitable impurity elements .

[0024] The preparation method of the high-strength and rapid decomposition of magnesium alloy by holding the pressure ball for the preparation of petroleum: first heat the crucible to dark red (about 450°C), put pure magnesium and pure aluminum into the crucible of the melting furnace, and at the same time pass the protective atmosphere; After the temperature of the crucible is raised to 720℃ and the charge is completely melted, add the remaining metal, stir for two minutes and keep it warm for 15 minutes; then keep the preset time to remove the surface oxides, and pour it into an iron model preheated at 250℃. It should be stable at the time.

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Abstract

The invention relates to high-strength rapid-decomposition magnesium alloy for an oil exploitation tripping ball and a preparation method, and belongs to the technical field of a magnesium alloy material. The technical problem that a tripping ball in the prior art needs flowbacking and milling during staged fracturing is solved. According to the solution scheme, the magnesium alloy comprises, by weight percentage, 3-15% of Al, 0.5-5% of Zn, 0-5% of Cu, and 0-5% of Ni, with the balance being Mg and inevitable impurity elements, wherein the content of Cu and Ni elements is not zero at the same time, and the weight percentage of all components is 100%. The invention further discloses a preparation method of the alloy material. Through full utilization of aluminum and zinc, the strength of magnesium alloy is improved, and through addition of copper and nickel, the decomposition rate is increased. The magnesium alloy is reasonable in ratio and simple in process, and through regulation of alloy components, a magnesium alloy material that can be fast decomposed in a specific condition and is high in strength is obtained.

Description

Technical field [0001] The invention belongs to the technical field of magnesium alloy materials, and particularly relates to a high-strength and fast-decomposing magnesium alloy using a pressure ball for petroleum development and a preparation method. Background technique [0002] In the field of oil development, multi-stage ball-throwing sliding sleeve fracturing is a widely used vertical well stratification and horizontal well segmented stimulation technology. The ball-throwing sliding sleeve system provides a channel for the fracturing fluid in the pipe string to flow to the formation. The sliding sleeve is closed before fracturing. During the fracturing process, a holding ball is sent to the ball seat to suppress the sliding sleeve and open the pipe string and the formation. Therefore, holding the pressure ball is a key factor in determining the success of fracturing. After the fracturing construction is completed, the traditional process is to return the pressure ball to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C23/04C22C1/02
Inventor 张跃忠刘宝胜房大庆王晓宇张代东王亚宁侯利锋
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY