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Soluble magnesium alloy material for all-metal bridge plug rubber sleeve and preparation method of soluble magnesium alloy material

A technology of bridge plug rubber cylinder and magnesium alloy, which is applied in the field of soluble magnesium alloy materials for all-metal bridge plug rubber cylinders and its preparation, can solve the problems of incomplete dissolution, poor high temperature and high pressure resistance, etc., and achieve improved mechanical properties, Moderate absolute strength, effect of increasing corrosion rate

Active Publication Date: 2021-06-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention aims at the problems of "shoulder protrusion" existing in the existing soluble rubber cylinder, incomplete dissolution after operation, poor high temperature and high pressure resistance, etc., and provides a soluble magnesium alloy material for all-metal bridge plug rubber cylinder, and can be used in The downhole environment can be completely dissolved

Method used

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  • Soluble magnesium alloy material for all-metal bridge plug rubber sleeve and preparation method of soluble magnesium alloy material
  • Soluble magnesium alloy material for all-metal bridge plug rubber sleeve and preparation method of soluble magnesium alloy material
  • Soluble magnesium alloy material for all-metal bridge plug rubber sleeve and preparation method of soluble magnesium alloy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Under the protection of Ar atmosphere, melting in a vacuum induction furnace, the melting and pouring temperature is 700 ~ 720 ℃, to obtain Mg-14Li-0.8Al-0.4Cu alloy (Wt.%), the ingot is cast in a medium temperature furnace at 230 ℃ ×5.5h of heat treatment, wrap the ingot with aluminum foil before heat treatment, and place carbon powder in the middle. The heat-treated ingot is taken out and placed in the air to cool; then the heat-treated ingot is placed in a medium-temperature furnace for preheating for 1.5 to 2 hours at a temperature of 230°C, and then extruded at 230°C with an extrusion ratio of 23. Conduct mechanical and corrosion performance tests.

[0068] The results of mechanical and corrosion properties of Mg-14Li-0.8Al-0.4Cu alloy are shown in Table 1.

Embodiment 2

[0070] The manufacturing method of the alloy of Example 2 is similar to that of Example 1. Under the protection of Ar atmosphere, it melted in a vacuum induction furnace to obtain Mg-9Li-0.8Ca-1.5Ni alloy (Wt.%). The ingot was heat-treated at 280°C×10h, and then extruded at 280°C. The pressure ratio is 23, and the mechanical and corrosion performance tests are carried out on the extruded rods.

[0071] The results of mechanical and corrosion properties of Mg-9Li-0.8Ca-1.5Ni alloy are shown in Table 1.

Embodiment 3

[0073] The manufacturing method of the alloy of Example 3 is similar to that of Example 1. Under the protection of Ar atmosphere, melted in a vacuum induction furnace to obtain Mg-9Li-0.7Zn-0.2Ni alloy (Wt.%), heat-treated the ingot at 270 ° C × 16 h, and then extruded at 270 ° C, extrusion The pressure ratio is 16, and the mechanical and corrosion performance tests are carried out on the extruded rods.

[0074] The results of mechanical and corrosion properties of Mg-9Li-0.7Zn-0.2Ni alloy are shown in Table 1.

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Abstract

The invention relates to soluble magnesium alloy for an all-metal bridge plug rubber sleeve and a preparation method of the soluble magnesium alloy. The technical scheme is characterized in that the soluble magnesium alloy comprises the following elements in percentage by mass: 8.0-14.0 wt.% of Li, M (M is at least one of Ni and Cu elements, wherein 0.01-5.0 wt.% of Ni, and 0.01-5.0 wt.% of Cu), and the balance of Mg. The soluble magnesium alloy further comprises an N element, wherein N is at least one of Al, Zn, Ca and Zr, specifically, 0.1-5.0 wt.% of Al, 0.1-3.0 wt.% of Zn, 0.1-2.0 wt.% of Ca, and 0.05-0.3 wt.% of Zr; and the balance of Mg. The soluble magnesium alloy is high in elongation and moderate in absolute strength, and generates radial deformation under the action of pressure, so that the soluble magnesium alloy is in contact with a sleeve to achieve a sealing effect. Moreover, the Mg-Li all-metal soluble rubber sleeve can be fully dissolved underground, no blocky or colloidal products and the like are left after dissolution, so that the channel blocking problem does not exist, secondary drilling is not needed, and thus the soluble magnesium alloy material has a wide application prospect in the field of oil exploitation.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation and processing, and relates to a soluble magnesium alloy material for an all-metal bridge plug rubber cylinder and a preparation method thereof. Background technique [0002] In the face of huge energy demand, the construction and production of oil and gas production capacity in the world are relatively insufficient. Coupled with the advancement of oil and gas engineering and mining technology, people have begun to pay more attention to unconventional oil and gas resources. According to the "International Energy Outlook 2016" report released by the US Energy Information Administration, the production of unconventional oil and gas will increase from 0.8227 trillion cubic meters in 2015 to 2.48 trillion cubic meters in 2040, and its rapid development has led to a decline in the global energy industry. Huge change. [0003] The staged horizontal well stimulation technology with br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/00C22C1/02C22F1/06
CPCC22C1/02C22C23/00C22F1/06
Inventor 李宏祥刘耀鸿张济山
Owner UNIV OF SCI & TECH BEIJING