Patent ID: 6732762
Filing Date: 2004-05-11
Classification: F16L

Abstract:
A completion plug for sealing off a hot-tap fitting comprising:(i) a body assembly; (ii) a sealing assembly having: an annular elastomeric seal; a static seal end, bonded to a one end of the elastomeric seal on an inner side of the static seal end and anchored to the body assembly on an outward side of the static seal end; a movable seal end, bonded to a second opposed end of the elastomeric seal, wherein when said movable seal end is displaced in a direction going away from the static seal end the elastomeric seal is tensioned and when the movable end is moved back towards the static seal end the tension on the seal is relaxed; (iii) a first reciprocable piston housed within the body assembly and connected to the movable seal end, said piston movable between a first position and a second position, wherein when said piston is in the first position the elastomeric seal is tensioned and when the piston is in the second position the elastomeric seal is relaxed; and (iv) means for moving the piston between the first and second position.