Electronic rupture discs for interventionless barrier plug

摘要

Methods and apparatus are presented for removing a degradable barrier plug positioned in a downhole axial passageway. The degradable plug is initially isolated from fluid by at least one solid, non-degradable cover. A first electronic rupture disc assembly is actuated to open a passageway to the degradable plug. A second electronic rupture disc assembly is actuated to allow a fluid, such as water from a supply chamber, to flow into contact with the plug. The plug is substantially degraded, although the cover remains. A third electronic rupture disc assembly is actuated to bend and then cover the remaining solid cover, thereby opening the axial passageway and protecting later-introduced tools.

主权项

1. A method for removing a plug positioned to block fluid flow through a passageway in a downhole tubular positioned in a subterranean wellbore, the plug isolated from fluid in the passageway by at least one cover, the method comprising the steps of:
actuating an electronic rupture disc assembly to open a fluid bypass to the plug, the rupture disk assembly having a rupture disc initially positioned to block fluid flow along the fluid bypass between the plug and the rupture disc; allowing a degrading fluid to flow from a fluid chamber and through the fluid bypass, thereby contacting the plug, wherein the fluid chamber extends across the passageway; and substantially degrading the plug using the degrading fluid.