Superelastic nickel-titanium alloy downhole seals, wellbore tools including such seals, and related methods
First Claim
Patent Images
1. A superelastic metal seal, comprising a superelastic Ni—
- Ti alloy, the superelastic Ni—
Ti alloy including, by weight percent, about 65% to about 58% nickel (Ni) and about 35% to about 42% titanium (Ti), and wherein the superelastic Ni—
Ti alloy is not capable of shape memory behavior.
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Abstract
A superelastic metal seal for use in a downhole tool, wherein the superelastic metal seal may be formed from a superelastic Ni—Ti alloy. The superelastic Ni—Ti alloy may be prestrained with a permanent strain. Superelasticity may be imparted to the superelastic Ni—Ti alloy through a thermal treatment process or through prestraining the superelastic Ni—Ti alloy. The superelastic Ni—Ti alloy may exhibit superelastic behavior. The superelastic Ni—Ti alloy may not exhibit shape memory behavior.
14 Citations
14 Claims
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1. A superelastic metal seal, comprising a superelastic Ni—
- Ti alloy, the superelastic Ni—
Ti alloy including, by weight percent, about 65% to about 58% nickel (Ni) and about 35% to about 42% titanium (Ti), and wherein the superelastic Ni—
Ti alloy is not capable of shape memory behavior. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- Ti alloy, the superelastic Ni—
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9. A downhole tool, comprising:
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a component; and a superelastic metal seal disposed adjacent the component, the superelastic metal seal comprising a superelastic Ni—
Ti alloy including, by weight percent, about 65% to about 58% nickel (Ni) and about 35% to about 42% titanium (Ti), and wherein the superelastic Ni—
Ti alloy exhibits superelastic behavior within a temperature range of from about 120°
C. to about 205°
C. and is not capable of shape memory behavior. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification