Magnesium alloy for fracturing ball and preparation method thereof

A magnesium-based alloy and alloy technology, which is applied in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of difficult flowback and the inability of the fracturing ball to dissolve by itself, and achieve the effect of optimizing and improving mechanical properties.

Active Publication Date: 2021-06-18
江苏奇纳新材料科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Purpose of the invention: In view of the problems existing in the prior art, the present invention provides a magnesium alloy for fracturing balls and its preparation method. The fracturing balls made of the magnesium-based alloy prepared by this method have high toughness, good plasticity, and can withstand pressure Strong capacity, the dissolution rate in the electrolyte solution meets the requirements, and solves the problems in the prior art that the fracturing balls made of metal or non-metal materials cannot dissolve by themselves and are not easy to flow back

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  • Magnesium alloy for fracturing ball and preparation method thereof
  • Magnesium alloy for fracturing ball and preparation method thereof

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Embodiment approach 1

[0033] This embodiment provides a soluble magnesium-based alloy for preparing fracturing balls for oil and gas development, including the following components in weight percentages: Al: 10%, Zn: 4%, Fe: 3%, Cu: 3%, Ni: 3%, Ca: 4%, Y: 0.5%, Mg: 72.5%.

[0034] The preparation method of the above-mentioned soluble magnesium-based alloy is as follows:

[0035] First, take the pure metals of Mg, Cu, Ni and Zn as raw materials according to the ratio, and the powder particles of Mg-Al, Mg-Ca, Mg-Y and FeCl prepared by powder metallurgy method with a particle size of 20-200 μm 3 Master alloys and dry treatment of all raw materials.

[0036] S1: Smelting: in CO 2 with SF 6 In a mixed gas atmosphere with a ratio of 300:1, first melt pure magnesium, then add pure metals of Cu, Ni and Zn with a purity of ≥99.9% at 710ºC, stir evenly and keep it warm for 25 minutes, then add Mg-Al with a purity of ≥99.9% , Mg-Ca and FeCl 3 Master alloy, stir well, keep it warm for 15min, cool down to...

Embodiment approach 2

[0043] This embodiment is roughly the same as Embodiment 1, the difference is only that (1) during S3 homogenization heat treatment, the heat treatment temperature is 400°C, and the treatment time is 20 hours; (2) the extrusion ratio during S4 extrusion is 15 ; (3) Among the components of the soluble magnesium-based alloy, Y: 1.5%, Mg: 71.5%.

[0044] Apart from this, this embodiment is completely the same as Embodiment 1, and details are not repeated here.

Embodiment approach 3

[0046] This embodiment is roughly the same as Embodiment 1, except that (1) during the homogenization heat treatment in S3, the heat treatment temperature is 370°C, and the treatment time is 40 hours; (2) the extrusion ratio during S4 extrusion is 5 ; (3) Among the components of the soluble magnesium-based alloy, Y: 1%, Mg: 72%. .

[0047] Apart from this, this embodiment is completely the same as Embodiment 1, and details are not repeated here.

[0048] The dissolution rate of the soluble magnesium-based alloy prepared in the above-mentioned embodiments 1 to 3 in 3% KCl solution at room temperature, the dissolution rate in 3% KCl solution at about 90°C, and the pressure parameters that the staged fracturing ball of a horizontal well can withstand are as follows Table 1.

[0049] Table 1

[0050]

[0051] It can be seen from Table 1 that the dissolution rate in 3% KCl solution at room temperature and 90°C is relatively high, and the mechanical properties are good, which ...

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Abstract

The invention relates to the field of metal smelting, and discloses a magnesium alloy for fracturing balls and a preparation method thereof. The soluble magnesium-based alloy includes the following components in weight percentage: Al: 6-16%, Zn: 1.0-6.5%, Fe: 0.1‑5.0%, Cu: 0.1‑7.0%, Ni: 0.1‑7.5%, Ca: 0.1‑8.0%, Y: 0.1‑1.5%, and the rest is Mg. Compared with the existing technology, the fracturing ball made of the magnesium-based alloy prepared by the method of the present invention has high toughness, good plasticity, strong pressure bearing capacity, and the dissolution rate in the electrolyte solution meets the demand, which solves the problem of the existing technology. Frac balls made of metal or non-metal materials cannot dissolve by themselves and are not easy to flow back.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a magnesium alloy for fracturing balls and a preparation method thereof. Background technique [0002] Among my country's new proven oil and gas reserves in recent years, low-permeability unconventional oil and gas resources have reached 70%, and the proportion of low-permeability oil and gas production in my country will continue to increase in the future. The stable and increased production of oil and gas production will rely more on Low permeability unconventional oil and gas resources. The development of these unconventional oil and gas resources requires the use of multi-layer and multi-stage fracturing technology. In the downhole layered and segmented fracturing, temporary plugging tools are required to isolate the layers. Tool removal. [0003] One of the key components of the staged fracturing technology for horizontal wells is the fracturing ball, which is the main factor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/02C22C23/04C22C1/03C22C23/00C22F1/06E21B43/26
CPCC22C1/03C22C23/00C22C23/02C22C23/04C22F1/06E21B43/26
Inventor 彭伟平陈业高赵虎杨建红赵泽综彭凌剑
Owner 江苏奇纳新材料科技有限公司
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