CORRODIBLE DOWNHOLE ARTICLE AND METHOD OF REMOVING THE ARTICLE FROM DOWNHOLE ENVIRONMENT
First Claim
Patent Images
1. A method of removing a corrodible downhole article having a surface coating, the method comprising:
- eroding the surface coating by physical abrasion, chemical etching, or a combination of physical abrasion and chemical etching,the surface coating comprising;
a metallic layer of a metal resistant to corrosion by a corrosive material.
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Abstract
A method of removing a corrodible downhole article having a surface coating includes eroding the surface coating by physical abrasion, chemical etching, or a combination of physical abrasion and chemical etching, the surface coating comprising a metallic layer of a metal resistant to corrosion by a corrosive material.
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Citations
21 Claims
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1. A method of removing a corrodible downhole article having a surface coating, the method comprising:
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eroding the surface coating by physical abrasion, chemical etching, or a combination of physical abrasion and chemical etching, the surface coating comprising; a metallic layer of a metal resistant to corrosion by a corrosive material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of forming a reversible seal with a corrodible downhole article, comprising
seating a ball or plug in the corrodible downhole article having a shaped surface which accommodates a surface shape of the ball or plug, the corrodible downhole article comprising: -
a magnesium alloy core, and a metallic layer covering the magnesium alloy core, the metallic layer being resistant to corrosion by a corrosive material, wherein the corrodible downhole article prevents fluid flow when seated. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of removing a corrodible downhole article, the article comprising:
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a magnesium alloy core, and a metallic layer covering the magnesium alloy core, the metallic layer being resistant to corrosion by a corrosive material, the method comprising eroding the metallic layer by physical abrasion, chemical etching, or a combination of physical abrasion and chemical etching, and corroding the corrodible downhole article in the corrosive material after eroding.
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20. An article for forming a downhole seal, comprising:
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a magnesium alloy core, and a metallic layer having a thickness of about 100 to about 500 micrometers and covering the magnesium alloy core, the metallic layer being formed of nickel, aluminum, or an alloy thereof, and resistant to corrosion by a corrosive material, the article being a ball seat or frac plug.
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21. A method of making an article for forming a downhole seal, comprising
plating, in the absence of water, a metallic layer having a thickness of about 100 to about 500 micrometers and resistant to corrosion by a corrosive material, on a surface of a magnesium alloy core, the article being a ball seat or frac plug.
Specification