Internally degradable plugs for downhole use

A downhole method, comprising:

• deploying a plug downhole, the plug comprising an outer body, at least one shell, and at least one breaching body, the outer body composed of a first material and having an interior and an exterior, the at least one shell disposed in the interior of the outer body and composed of a second material, the at least one shell defining at least one hollow containing at least one activating agent, the at least one breaching body disposed in the outer body and composed of a solid material, the at least one breaching body being in breaching contact with the at least one shell;
• exposing the plug to a trigger;
• releasing the at least one activating agent in the interior of the plug in response to the exposure by breaching the at least one shell in the interior of the plug with the at least one breaching body;
• and
• degrading the outer body from the interior of the outer body toward the exterior of the outer body with the at least one released activating agent.

A plug for downhole deployment, comprising:

• a body of the plug composed of a first material and having an interior and an exterior;
• a shell comprising a first chamber and a second chamber disposed in the interior and composed of a second material, the second material of the at least one shell being breachable;
• at least one activating agent comprising a first agent disposed in the first chamber and a second agent disposed in the second chamber,
• a division dividing the first chamber from the second chamber and breaching between the first chamber and the second chamber to place the first agent in contact with the second agent,
• the first material of the body being degradable by the at least one activating agent acting from the interior of the body toward the exterior of the body.

A plug for downhole deployment, comprising:

• a body of the plug composed of a first material and having an interior and an exterior;
• at least one shell comprising a first shell and a second shell disposed in the interior, at least the second shell being composed of a second material being breachable;
• at least one activating agent comprising a first agent disposed in the first shell and a second agent disposed in the second shell,
• the second agent breaches the first shell,
• the first material of the body being degradable by the at least one activating agent acting from the interior of the body toward the exterior of the body.