Patent ID: 8444183

Claim:
A wellhead including an instrumentation string outlet, the instrumentation string outlet comprising: a first hub defining a sealing profile; a second hub defining a sealing profile; a barrier seal disposed between the first hub and the second hub, the barrier seal comprising: a bulkhead having a first end, a second end, and a surface extending between the first end and the second end; and a rib extending radially outwardly from the surface of the bulkhead, the rib defining a first sealing profile extending from a first side of the rib and a second sealing profile extending from a second side of the rib, wherein the rib further defines a plurality of alignment openings; and a clamp engaged with the first hub and the second hub for deflecting the first sealing profile into sealing engagement with the sealing profile of the first hub and for deflecting the second sealing profile into sealing engagement with the sealing profile of the second hub.