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A kind of fracturing ball of soluble magnesium alloy composite material and preparation method thereof

A composite material and fracturing ball technology, applied in chemical instruments and methods, electrolytic coatings, drilling compositions, etc., can solve the problems of complex chemical composition, complex preparation process and high material cost of cast magnesium alloys, and achieve dissolution and collapse. High speed, easy availability of raw materials and small machining allowance

Inactive Publication Date: 2019-01-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the cast magnesium alloy has complex chemical composition and contains precious metal elements such as Ag, Zr, Ti, etc., resulting in high material cost
The disadvantage is that the chemical composition contains precious metal Co, and the metal powder is completely used as the raw material, the cost is high, and the preparation process is relatively complicated.
The disadvantage is that the chemical composition contains more precious metal Ca

Method used

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  • A kind of fracturing ball of soluble magnesium alloy composite material and preparation method thereof
  • A kind of fracturing ball of soluble magnesium alloy composite material and preparation method thereof
  • A kind of fracturing ball of soluble magnesium alloy composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The light weight pressure-resistant soluble floating beads / magnesium alloy composite fracturing ball in this embodiment includes the following composition in weight percent: Al: 10%; Zn: 3%; Fe: 0.5%; Cu: 0.5%; Ni : 0.5%; floating beads: 6%; the balance is Mg. The raw materials used are AZ91D magnesium alloy, pure magnesium (purity ≥99.95%), floating beads, 1060 pure aluminum plate (purity ≥99.6%), zinc powder (purity ≥95.0%), reduced iron powder (purity ≥98.0%), copper powder (purity ≥ 99.7%) and nickel powder (purity ≥ 99.5%), raw material particle size: zinc powder 20μm-50μm, reduced iron powder 10μm-44μm, copper powder 20μm-40μm, nickel powder 20μm-50μm, the average particle size of floating beads is 90 μm. The specific preparation process is: prepare 600ml of sodium hydroxide aqueous solution with a concentration of 1.5mol / L in a glass beaker, heat it to 50°C on a constant temperature magnetic stirrer, put 60g of sieved floating beads with an average particle size...

Embodiment 2

[0031] The difference between this example and Example 1 is that the inventive light-weight pressure-resistant soluble floating beads / magnesium alloy composite fracturing ball includes the following composition by weight percentage: Al: 15%; Zn: 6%; Fe: 1 %; Cu: 1%; Ni: 1%; floating beads: 8%; the balance is Mg. The floating beads with an average particle size of 80 μm were preheated to 350°C, and the AZ91D magnesium alloy was melted and heated to 710°C. Add pure magnesium, 1060 pure aluminum plate, zinc powder, reduced iron powder, copper powder and nickel powder according to the design ratio into the AZ91D magnesium alloy melt, keep it warm for 10 minutes to melt all the metals, and then lower the temperature of the alloy melt to 580°C. Stir the magnesium alloy melt with a mechanical stirring device at a stirring speed of 700r / min, add the preheated floating beads with a mass fraction of 8% to the magnesium alloy vortex formed by stirring, and continue stirring for 5 minute...

Embodiment 3

[0033] The difference between this example and Example 1 is that the inventive light-weight pressure-resistant soluble floating beads / magnesium alloy composite fracturing ball includes the following composition by weight percentage: Al: 20%; Zn: 9%; Fe: 1.5 %; Cu: 1.5%; Ni: 1.5%; floating beads: 8%; the balance is Mg. Floating beads with an average particle size of 80 μm were preheated to 350°C. AZ91D magnesium alloy is melted and heated to 730°C. Add pure magnesium, 1060 pure aluminum plate, zinc powder, reduced iron powder, copper powder and nickel powder according to the design ratio into the molten AZ91D magnesium alloy melt, keep it warm for 10 minutes to melt all the metals, and then put the alloy melt The temperature dropped to 600°C. Stir the magnesium alloy melt with a mechanical stirring device at a stirring speed of 700r / min, add the preheated floating beads with a mass fraction of 8% into the magnesium alloy vortex formed by stirring, and continue stirring for 4m...

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Abstract

The invention discloses a soluble magnesium alloy composite fracturing ball and a preparation method thereof, which belongs to the field of manufacturing of unconventional oil and gas equipment. The fracturing ball is prepared from the following components according to mass percent: 3% to 7% of Al, 0.5% to 3% of Zn, 0.5% to 3% of Fe, 0.5% to 3% of Cu, 0.5% to 3% of Ni, 4% to 8% of floating beads and the balance of Mg. The preparation method comprises the steps of melting magnesium alloy in a crucible resistance furnace, controlling the temperature to 550 to 580 DEG C, adding a certain proportion of preheated floating beads in a mechanical mixing condition, heating to 700 to 730 DEG C, uniformly mixing, insulating and standing for certain time, then pouring to a graphite mold with a spherical inner cavity, cooling and freezing, so that a workblank of the floating bead / magnesium alloy soluble composite fracturing ball is obtained; machining the workblank of the fracturing ball by adopting a center lathe and a hard alloy cutter, so that the soluble fracturing ball of the require size is obtained; and preparing a protective ceramic membrane on the surface of the soluble fracturing ball by adopting micro plasma oxidation. The fracturing ball has the advantages of light weight, pressure resistance, high solution rate, simple preparation process and low cost and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of unconventional oil and gas equipment manufacturing, and relates to a fracturing ball made of a soluble composite material with magnesium alloy as the matrix and floating beads as the reinforcement and a preparation method thereof. The magnesium alloy composite material fracturing ball rapidly dissolving in the electrolyte solution can be used as a dissolvable fracturing ball used in multi-stage ball sliding sleeve staged fracturing technology in unconventional oil and gas production. Provide strong technical support for the exploitation of shale gas and tight oil and gas. Background technique [0002] In recent years, with the rapid consumption of conventional oil and gas resources and the increasing difficulty of development, the exploration and development of unconventional oil and gas resources has shown a rapid upward trend. my country's main oilfields are all facing the development problems of low and ultra-l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C32/00C22C1/10C22C1/06C25D11/30C09K8/62C09K8/70
CPCC09K8/62C09K8/70C22C1/06C22C1/1036C22C23/02C22C32/001C25D11/026C25D11/30
Inventor 于思荣纪志康熊伟刘恩洋姜倩赵严
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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