CPC E21B 34/063 (2013.01) [E21B 33/1208 (2013.01)] | 20 Claims |
1. A barrier plug assembly for sealing a subterranean wellbore, the barrier plug assembly comprising:
a tubular housing having a topside end and a down-hole end, and having a fluid passageway through the tubular housing;
a frangible barrier element disposed in the fluid passageway, such that fluid cannot flow through the fluid passageway when the frangible barrier element is disposed in the fluid passageway, wherein the frangible harrier element is mounted on a carrier ring and is comprised of a frangible material that breaks when the frangible barrier element is subjected to a concentrated force;
a retaining device configured to lock the carrier ring in place when a locking sleeve is in a first position, and the retaining device configured to unlock the carrier ring when the locking sleeve is in a second position; and
a valve enabled for fluid communication with a fluid chamber and further enabled for fluid communication with the topside end, the valve configured to allow or prevent fluid communication between the topside end and the fluid chamber wherein the fluid chamber is enclosed when the valve is closed.
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