CPC E21B 34/063 (2013.01) [E21B 34/14 (2013.01)] | 20 Claims |
1. A frangible disc sub comprising:
a sub housing;
a disk carrier movably disposed in the sub housing;
a frangible disk sealedly disposed in the carrier;
a breaker mechanism movably disposed in the sub housing from an inactive position to an active position, the breaker mechanism comprising:
a breaker housing movable within the sub housing; and
a breaker concealed within the breaker housing; and
a breaker housing movement inhibitor disposed to inhibit movement of the breaker mechanism relative to the sub housing, wherein the breaker housing movement inhibitor is a crush sleeve.
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