Apparatus for Providing a Temporary Degradable Barrier in a Flow Pathway

A downhole filtration tool comprising:

• orifices in a flow pathway;
• and
• a degradable barrier in the orifices, where the degradable barrier is selected from the group consisting of polycaprolactams, polyglycolic acid, polyvinyl alcohols, polyethylene homopolymers, materials comprising solid acid particles, and combinations thereof, and where the degradable barrier degrades into at least one product selected from the group consisting of acids, bases, alcohols, carbon dioxide and combinations thereof, where the product can remove a temporary coating.

A sand control screen comprising:

• orifices in a flow pathway;
• and
• a degradable barrier in the orifices, where the degradable barrier is selected from the group consisting of polycaprolactams, polyglycolic acid, polyvinyl alcohols, polyethylene homopolymers, materials comprising solid acid particles, and combinations thereof, and where the degradable barrier degrades into at least one product selected from the group consisting of organic acids, bases, alcohols, carbon dioxide and combinations thereof, where the product can remove a temporary coating.