Method for remediating a screen-out during well completion

A method of completing a well, comprising:

• forming a wellbore, the wellbore comprising a bore extending into a subsurface formation;
• lining at least a lower portion of the wellbore with a string of production casing;
• placing a valve along the production casing, the valve creating a removable barrier to fluid flow within the bore;
• perforating the production casing along a first zone of interest within the subsurface formation, the first zone of interest residing at or above the valve;
• injecting a slurry into the wellbore, the slurry comprising a fracturing proppant;
• in response to a condition of screen-out along the first zone of interest during the injecting, pumping the slurry at a pressure sufficient to move the valve and overcome the barrier to fluid flow, thereby exposing ports along the production casing to the subsurface formation at or below the valve;
• and
• further pumping the slurry through the exposed ports, thereby remediating the condition of screen-out.