PIPELESS SAGD SYSTEM AND METHOD

摘要

A SAGD system including a string defining an axial flow channel and an annul ar flow pathway, a fluid access structure between the axial flow channel and th e annular flow pathway, and a valve disposed within the annular flow pathway. The valv e being selectively closable to selectively inhibit annular flow in an uphole direction. A method for treating a SAGD formation.