| CPC E21B 34/06 (2013.01) [F16K 11/0712 (2013.01)] | 19 Claims |

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1. A sealing device for sealing an interface between a first surface and a second surface, including:
a primary sealing element for forming a primary seal at the interface;
a carrier body that is slidable with respect to the interface to engage the primary sealing element; and
an inner carrier sealing element and an outer carrier sealing element that are configured to seal the interface with a secondary seal, wherein the inner carrier sealing element is positioned at an inner surface of the carrier body and the outer carrier sealing element is positioned at an outer surface of the carrier body opposite the inner surface, and wherein the carrier body is slidable to engage the primary sealing element based on the secondary seal sealing the interface.
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