Patent ID: 8297359
Filing Date: 2012-10-30
Classification: E21B

Abstract:
1. A marine riser well intervention tie-back system comprising: a) a lower riser package (LRP) comprising a tree connector, a connector and seal stab adapter (CSSA), and a lower riser package body (LRP body), b) an emergency disconnect package (EDP) removably connected to the LRP, wherein: the EDP comprises a body (EDP body) having a quick disconnect connector on its lower end, one or more EDP sealing elements capable of sealing upon command, and at least one annulus isolation valve, the EDP body having an internal tie-back profile; c) an internal tie-back tool (ITBT) removably connected to the EDP body via the internal tie-back profile; and d) a collapse-resistant flexible hose fluidly connecting the LRP to the subsea tree.