Patent ID: 11939836
Assignee: ADVANCED UPSTREAM LTD.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 23:
24. The port sub as claimed in claim 20, wherein:
the control flow port sealing configuration is configurable in a sealing-effective configuration and a sealing-defeating ready configuration;
wherein:
the sealing-effective configuration includes:
an inner barrier; and
an outer barrier;

the sealing effective configuration and the control flow port are co-operatively configured such that:
the inner barrier is spaced apart from the outer barrier such that a control flow port sealing configuration chamber is established;
the inner barrier is effective for sealing fluid communication between the flow passage and the control flow port configuration chamber;
the outer barrier is effective for sealing fluid communication between the control flow port sealing configuration chamber and the environment external to the housing;
the control flow port flow controller is disposed in the closed configuration while the control flow port sealing configuration is disposed in the sealing-effective configuration;
and
the sealing of flow communication, for which the inner barrier is effective, is defeatable in response to application of an inner barrier-defeating fluid pressure and only if the inner barrier-defeating fluid pressure is equal to or greater than an inner barrier-defeating minimum predetermined pressure, wherein the defeating is with effect that the control flow port configuration transitions from the sealing-effective configuration to the sealing defeating-ready configuration such that, in the sealing defeating-ready configuration, the outer barrier is effective for sealing fluid communication between the flow passage and the environment external to the housing, wherein the inner barrier-defeating minimum predetermined pressure is independent of the pressure of the external environment, such that the control flow port flow controller is disposed in the closed configuration while the control flow port sealing configuration is disposed in the sealing defeating-ready configuration.