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Soluble magnesium-based alloy and its preparation method

A magnesium-based alloy, soluble technology, applied in earthwork drilling, wellbore/well components, mining fluids, etc., can solve problems such as difficult flowback, fracturing balls cannot dissolve by themselves, reduce segregation, improve electricity Chemical performance, effect of improving stability

Active Publication Date: 2020-10-16
江苏奇纳新材料科技有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a soluble magnesium-based alloy and its preparation method. The fracturing ball made of the magnesium-based alloy prepared by this method has high toughness, good plasticity and strong pressure bearing 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

Method used

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  • Soluble magnesium-based alloy and its preparation method
  • Soluble magnesium-based alloy and its preparation method
  • Soluble magnesium-based alloy and its preparation method

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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: Mn: 0.2%, Ca: 1%, Nb: 1%, Ge: 2%, Si: 0.2%, Hg: 1.6%, Ga: 1.0%, Dy: 0.4%, Mg: 92.6%, and the Ga / Hg ratio is 0.63.

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

[0035] First, take the pure metals of Mg, Mn, Nb as raw materials according to the ratio, and Mg-Ca, Mg-Si, Mg-Hg, Mg--Dy, Mg-Ge, Mg with powder particles of 20~200 μm prepared by powder metallurgy. -Ga master alloy, 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 Mn and Nb with a purity of ≥99.9% at 690ºC, stir evenly and keep warm for 30 minutes, then add Mg-Ca and Mg with a purity of ≥99.9% -Si, Mg-Hg, Mg-Dy, Mg-Ge, Mg-Ga master alloys, stir well, k...

Embodiment approach 2

[0044] 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 380°C, and the treatment time is 30 hours; (2) the extrusion ratio during S4 extrusion is 5 ; (3) Among the components of the soluble magnesium-based alloy, Ga is 1.5%, Mg: 92.1%; among them, the ratio of Ga / Hg is 0.94.

[0045] Apart from this, this embodiment is completely the same as Embodiment 1, and details are not repeated here.

Embodiment approach 3

[0047] 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 420°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, Hg is 1.5%; Ga is 1.5%, and Mg: 92.2%; among them, the Ga / Hg ratio is 1.1.

[0048] Apart from this, this embodiment is completely the same as Embodiment 1, and details are not repeated here.

[0049] 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.

[0050] Table 1

[0051]

[0052] It can be seen from Table 1 that the dissolution rate in 3% KCl solution at room temperature and 90°C ...

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Abstract

The invention relates to the field of metal smelting, and discloses a soluble magnesium base alloy and a preparation method thereof. The soluble magnesium base alloy is prepared from the following components in percentage by weight: 0.1-0.3% of Mn, 0.5-1.5% of Ca, 0.5-2% of Nb, 1-3% of Ge, 0.1-0.3% of Si, 1.4-1.9% of Hg, 0.9-1.5% of Ga, 0.3-0.5% of Dy, and the balance of Mg. A proportion of Ga toHg in the magnesium base alloy is 0.45 to 1.1. Compared with the prior art, fracturing balls which are made of the magnesium base alloy prepared by the method have high toughness, high plasticity andhigh pressure resistance capacity, the dissolution rate in an electrolyte solution meets the needs, and the problems that the fracturing balls which are made of metal materials or non-metallic materials cannot dissolve automatically and are difficult to flow back are solved.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a soluble magnesium-based alloy 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 determi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/03C22F1/06E21B43/26
CPCC22C1/03C22C23/00C22F1/06E21B43/26
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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