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A degradable alloy and its application as a single-slip soluble bridge plug

A single-slip and slip-type technology, applied in wellbore/well components, sealing/isolation, earthwork drilling and production, etc., can solve the problem of short degradation time, unable to meet the working requirements of long-term dissolution, and single application range and other problems, to achieve the effect of solving the problems of easy jamming, controllable corrosion time, excellent sealing performance and pressure bearing performance

Active Publication Date: 2020-02-21
CHONGQING INST OF GEOLOGY & MINERAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al is the main alloying element, and forms the basic system of rapidly degrading magnesium alloys with Mg. In specific applications, its degradation time is short, so the application range is single, and it cannot meet the working requirements of long-term dissolution.

Method used

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  • A degradable alloy and its application as a single-slip soluble bridge plug
  • A degradable alloy and its application as a single-slip soluble bridge plug
  • A degradable alloy and its application as a single-slip soluble bridge plug

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment one, a kind of degradable alloy, it comprises following components:

[0034] Zn is 70%, Mg is 15%, Na is 9.5%, Fe is 3%, C is 0.5%, Si is 1%, Ni is 1%, and unavoidable impurities.

Embodiment 2

[0035] Embodiment two, a kind of degradable alloy, it comprises following components:

[0036] Zn is 65%, Mg is 15%, Na is 10%, Fe is 5%, C is 0.5%, Si is 2%, Ni is 2%, and unavoidable impurities.

Embodiment 3

[0037] Embodiment three, a degradable alloy, which includes the following components:

[0038] Zn is 75%, Mg is 5%, Na is 10%, Fe is 5%, C is 0.5%, Si is 2%, Ni is 2%, and unavoidable impurities.

[0039] The rigidity of the soluble bridge plugs prepared by using the degradable alloys of Example 1, Example 2, and Example 3 is doubled or more than that of conventional soluble bridge plugs with Mg as the main body of the alloy material. Under the condition of 60°C, the maximum pressure is 120 MPa, the pressure stabilization time is 2 days or more, and the total dissolution time is 10 days or more. Under the condition of 120°C, the maximum pressure is 100 MPa, the pressure stabilization time is 6 hours or more, and the total dissolution time is 3 days or more.

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Abstract

The invention discloses a degradable alloy and application of the degradable alloy serving as a single-slip-type soluble bridge plug. The degradable alloy comprises the following components of 60-75%of Zn, 5-15% of Mg, 5-10% of Na, 1-5% of Fe, 0.1-0.5% of C, 0.5-2% of Si, 0.5-2% of Ni and inevitable impurities, wherein the sum of mass fractions of all the components is 100%. The degradable alloyis utilized to manufacture a tool for fracturing construction, the tool is automatically melted in a pit after completing a work task and can be completely degraded, the problems of liable clamping and plugging of a channel do not exist, the degrading time is controllable, and the sealing property and pressure-bearing property are excellent.

Description

technical field [0001] The invention relates to the field of oil and gas, shale gas, and coalbed methane reservoir fracturing reconstruction, in particular to a degradable alloy and its application as a single-slip soluble bridge plug. Background technique [0002] With the development of my country's social economy, the demand for energy is increasing, and the import volume and import ratio of oil and gas resources continue to rise. The existing high-efficiency and economical oil and gas reservoirs in my country are becoming less and less. In order to alleviate and ensure my country's energy security, it is imminent to develop unconventional and low-efficiency oil and gas resources. Reservoir stimulation technology is one of the effective technologies for developing such resources. Staged fracturing technology is a commonly used and successful technology for reservoir stimulation. At the same time, the bridge plug tool is one of the commonly used tools in staged fracturing t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134E21B33/129C22C23/04C22C18/00
CPCC22C18/00C22C23/04E21B33/129E21B33/134
Inventor 陆朝晖贺培程礼军张烨荆毅张健强董兵强郑永华
Owner CHONGQING INST OF GEOLOGY & MINERAL RESOURCES
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