US 2022/0065070 A1Published application

Port sub with delayed opening sequence

AssigneeAdvanced Upstream Ltd.

InventorsTom WATKINS, Jeyhun NAJAFOV

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Abstract

A port sub comprises one or more standard flow ports, each having a low-pressure port assembly positioned therein to, and at least one control flow port having a high-pressure port assembly positioned therein. The low-pressure port assembly comprises an inner layer having a first rupture pressure and an outer layer configured to remain intact upon the rupturing of the inner layer. The high-pressure port assembly comprises an inner layer having a second rupture pressure that is greater than the first rupture pressure. The high-pressure port assembly is configured to be broken through upon the rupturing of its inner layer to allow fluid flow through the at least one control flow port, thereby allowing a dissolve fluid to flow therethrough to facilitate the disintegration of the outer layer of the low-pressure port assembly to open the one or more standard flow ports.

Claims22

Dependent claims

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, a 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, a 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.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/211,505Filed 24 Mar 2021
Priority: 31 Aug 2020
Published: 3 Mar 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

E21B 34/063
In wells: valve or closure with destructible element, e.g. frangible disc
E21B 34/108
Operated by control fluid supplied from outside the borehole: with time delay systems, e.g. hydraulic impedance mechanisms
E21B 47/06
Survey of boreholes or wells: measuring temperature or pressure
E21B 2200/08
Special features related to earth drilling for obtaining oil, gas or water: down-hole devices using materials which decompose under well-bore…