Compound grease coating for controlled dissolution of a dissolvable component of a downhole tool

A method for removing a downhole tool from a wellbore, the method comprising the steps of:

• spraying an activation layer on a component substrate of the downhole tool onsite at a wellbore location, said activation layer being comprised of an activation compound and having an activation layer thickness with an activation layer thickness range of 10-500 μm,
• wherein said activation compound comprises silicones, epoxy or acrylic;
• applying a first grease layer over said activation layer onsite at said wellbore, said first grease layer having a first grease layer consistency range of NLGI 200-270 and a first grease layer thickness with a first grease layer thickness range of 100-1000 μm, said first grease layer being bonded non-uniformly to said activation layer;
• applying a second grease layer over said first grease layer onsite at said wellbore location, said second grease layer having a second grease layer consistency range of NLGI 280-320 and a second grease layer thickness with a second grease layer thickness range that is 500-2000 μm, said second grease layer being bonded non-uniformly to said first grease layer, so as to form a compound coating on said component substrate;
• forming a transition zone with said first grease layer and said second grease layer;
• deploying said component substrate with said compound coating to a downhole location;
• protecting said component substrate from dissolution with said compound coating on said component substrate for 6-24 hours;
• and
• dissolving said component substrate so as to remove the downhole tool from the wellbore.