| CPC E21B 33/1212 (2013.01) [E21B 33/129 (2013.01)] | 17 Claims |

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1. A downhole tool, comprising:
a tubular;
a first wire of expandable metal placed about the tubular, the first wire of expandable metal comprising a first metal configured to expand in response to hydrolysis and having a surface-area-to-volume ratio (SA:V) of at least 2 cm−1; and
a second different wire of expandable metal placed about the tubular, the second different wire of expandable metal comprising a second metal configured to expand in response to hydrolysis.
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