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

Claim 13:
14. A port sub comprising:
a wall having defined therein a standard flow port and a control flow port;
a low-pressure port assembly disposed in the standard flow port, the low-pressure port assembly comprising:
a low-pressure inner layer having a first rupture pressure; and
a low-pressure outer layer, at least a portion of the low-pressure outer layer being spaced apart from the low-pressure inner layer to define a first chamber therebetween, the low-pressure port assembly having an intact position, an interim position, and an open position, wherein in the intact position, both the low-pressure inner layer and low-pressure outer layer are intact; in the interim position, the low-pressure inner layer is ruptured and the low-pressure outer layer is intact; and in the open position, the low-pressure inner layer is ruptured and the low-pressure outer layer is broken through;

a high-pressure port assembly disposed in the control flow port, the high-pressure port assembly comprising:
a high-pressure inner layer having a second rupture pressure, the second rupture pressure being greater than the first rupture pressure; and
a high-pressure outer layer configured to rupture immediately after rupturing of the high-pressure inner layer, at least a portion of the high-pressure outer layer being spaced apart from the high-pressure inner layer to define a second chamber therebetween, the high-pressure port assembly having an intact position and an open position, wherein in the intact position, both the high-pressure inner layer and high-pressure outer layer are intact; and in the open position, both the high-pressure inner layer and the high-pressure outer layer are ruptured,
wherein each of the high-pressure inner layer and the high-pressure outer layer is a burst disk, and wherein the high-pressure port assembly is free of a dissolvable barrier.