Burst port sub with dissolvable barrier
AssigneeTrican Completion Solutions Ltd.
InventorsMike Bellavance, Todd Atkinson, Tore Sørheim
Life of this patent
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Abstract
The present invention relates to burst port subs (BPS) 120 allowing for a tubing 100 or a liner 200 or a casing 200 in a borehole 300 to be opened at a predetermined pressure and further providing a delayed opening sequence due to a dissolvable barrier 400, 500 arranged in a port 440, 540 of the sub 120. The present invention relates further to a downhole system comprising a predetermined number of such burst port subs (BPS) 120.
Claims13
A plurality of burst port subs arranged a predetermined distance from each other, each burst port sub comprising:
- at least one radial port;
- a burst disk arranged on an inner end of the port, the burst disk being adapted to burst at a predetermined pressure;
- a dissolvable barrier arranged within the port, the dissolvable barrier being adapted to dissolve after a predetermined period of time in order to provide an open conduit;
- an insert adapted to be arranged in the port and hold the dissolvable barrier a predetermined distance above the burst disk such that a space is created between the dissolvable disk and the burst disk within the port;
- a cap arranged on an outer end of the port;
- and
- a chamber with an atmospheric pressure,
- wherein the chamber contains the dissolvable barrier and both the chamber and the dissolvable barrier are arranged in the port and between the burst disk and the cap, and
- the plurality of burst port subs has a delayed opening sequence and each burst port sub of the plurality of burst ports has the delayed opening at a different pressure from another burst port sub.
A downhole system comprising a casing and a plurality of burst port subs arranged a predetermined distance from each other on the casing, each port sub comprising:
- at least one radial port;
- a burst disk arranged on an inner end of the port, the burst disk being adapted to burst at a predetermined pressure;
- a dissolvable barrier arranged within the port, the dissolvable barrier being adapted to dissolve after a predetermined period of time in order to provide an open conduit;
- an insert adapted to be arranged in the port and hold the dissolvable barrier a predetermined distance above the burst disk such that a space is created between the dissolvable disk and the burst disk within the port;
- a cap arranged on an outer end of the port;
- and
- a chamber with an atmospheric pressure,
- wherein the chamber contains the dissolvable barrier and both the chamber and the dissolvable barrier are arranged in the port and between the burst disk and the cap, and
- the at least one burst port sub is peripherally arranged in at least one of a tubing, the casing and a liner, and
- the plurality of burst port subs has a delayed opening sequence and each burst port sub of the plurality of burst ports has the delayed opening at a different pressure from another burst port sub.
Dependencies are inferred from the claim text.