| CPC E21B 33/1208 (2013.01) [E21B 36/04 (2013.01)] | 15 Claims |

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1. A seal for a wellbore system, comprising:
a seal tool, including:
a mandrel;
a seal material surrounding the mandrel;
a frustocone disposed about the mandrel;
a slip adjacent the frustocone; and
a temperature control material dopant in the seal material.
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