US Patent 8689894 Method and composition for zonal isolation of a well

The invention provides a system comprising: a tubular containing a first surface comprising a coating made of a first swellable material coating said first surface, wherein said coating has a second surface and said first swellable material is able to swell in contact with a first fluid on said second surface; and a composition made of a settable material and a second swellable material able to swell in contact with a second fluid. The invention also discloses the method associated with the use of such a system.