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Soluble magnesium alloy for oil exploitation and preparation method thereof

A soluble, magnesium-based alloy technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult flowback, fracturing balls cannot dissolve by themselves, etc., to reduce stress concentration, good mechanical properties, increase Quantity effect

Pending Publication Date: 2021-06-04
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a magnesium alloy for fracturing balls and a preparation method thereof. The fracturing balls made of the magnesium-based alloy prepared by the method have 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 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 alloy for oil exploitation and preparation method thereof
  • Soluble magnesium alloy for oil exploitation and preparation method thereof
  • Soluble magnesium alloy for oil exploitation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0034] This embodiment provides a soluble magnesium-based alloy for oil exploitation using fracturing balls, comprising the following components by weight: Cu: 5.0%, Al: 5.0%, Zn: 3.0%, Y: 1.0%, Ni: 5.0 %, Si: 0.2%, Mn: 0.2%, Co: 0.7%, Cr: 0.2%, Fe: 0.2%, Mg: 81.5%.

[0035] The above-mentioned petroleum exploitation adopts the preparation method of soluble magnesium-based alloy as follows:

[0036] S1 material preparation: use raw materials Mg, Cu, Ni, Mn, Co, Cr pure metal according to the proportion, and Mg-Al, Mg-Zn, Mg-Si, Mg with powder particles of 20-200 μm prepared by powder metallurgy method -Y and FeCl 3 Master alloys, and all raw materials are dried.

[0037] S2 smelting: in CO 2 with SF 6 In a mixed gas atmosphere with a ratio of 300:1, pure magnesium was first melted, and then pure metals of Cu, Ni, Mn, Co, Cr were added at 710 °C, stirred evenly, kept for 40 minutes, cooled to 695 °C, and Mg-Al was added. Mg-Zn, Mg-Si and FeCl 3 The master alloy was stirre...

Embodiment approach 2

[0044] This embodiment is roughly the same as Embodiment 1, and the only difference is:

[0045] (1) In the soluble magnesium-based alloy components of fracturing balls used in petroleum development, Y: 1.0%, Mg: 81.5%;

[0046] (2) During the S4 homogenization heat treatment, the heat treatment temperature is 380°C and the treatment time is 40 hours;

[0047] (3) The extrusion ratio at the time of extrusion at S5 is 7.

[0048] Except for this, this embodiment is exactly the same as Embodiment 1, which is not repeated here.

Embodiment approach 3

[0050] This embodiment is roughly the same as Embodiment 1, and the only difference is:

[0051] (1) In the soluble magnesium-based alloy components of fracturing balls used in petroleum development, Y: 1.5%, Mg: 81%;

[0052] (2) During the S4 homogenization heat treatment, the heat treatment temperature is 400°C and the treatment time is 30 hours;

[0053] (3) The extrusion ratio at the time of extrusion at S5 is 10.

[0054] Except for this, this embodiment is exactly the same as Embodiment 1, which is not repeated here.

[0055] The dissolution rate in the 3% KCL solution at room temperature, the dissolution rate in the 3% KCL solution at about 90°C, and the pressure parameters that the horizontal well staged fracturing ball can withstand are as follows Table 1.

[0056]

[0057] It can be seen from Table 1 that even in a 3% KCL aqueous solution at room temperature, the soluble magnesium alloy used for petroleum development has a higher dissolution rate and better me...

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Abstract

The invention relates to the field of metal smelting, and discloses a soluble magnesium-based alloy for oil exploitation and a preparation method of the soluble magnesium-based alloy. The soluble magnesium-based alloy for oil exploitation comprises, by weight percentage, 1%-5% of Cu, 3%-10% of Al, 1%-5% of Zn, 1%-3% of Y, 0.1%-5.0% of Ni, 0.1%-0.5% of Si, 0.1%-0.3% of Mn, 0.1%-1.0% of Co, 0.1%-0.3% of Fe and the balance Mg. Compared with the prior art, a fracturing ball which is made of the soluble magnesium-based alloy, used for oil exploitation, prepared according to the method is high in toughness, good in plasticity and high in pressure bearing capacity, the dissolution rate of the fracturing ball in an electrolyte solution meets the requirement, and the problem that in the prior art, a fracturing ball which is made of a metal or non-metal material cannot be automatically dissolved and is not prone to flowing back after fracturing operation is accomplished is solved.

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 horizontal well staged fracturing technology. In downhole layered and staged fracturing, temporary plugging tools are needed to isolate the layers. Sex tool removal. [0003] One of the key components of staged fracturing technology for horizontal wells is the fracturing ball, which is one of the main factors that d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C1/03C22C1/04C22F1/06C09K8/66C09K8/70C09K8/84C09K8/92
CPCC22C23/02C22C1/03C22C1/0408C22F1/06C09K8/665C09K8/70C09K8/845C09K8/92
Inventor 赵泽综杨建红彭伟平赵虎华国民陈业高
Owner JIANGSU UNIV
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