Abstract: A method for “tagging” proppants so that they can be tracked and monitored in a downhole environment, based on the use of composite proppant compositions comprising a particulate substrate coated by a material whose electromagnetic properties change at a detectable level under a mechanical stress such as the closure stress of a fracture. In another aspect, the invention relates to composite proppant compositions comprising coatings whose electromagnetic properties change under a mechanical stress such as the closure stress of a fracture. The substantially spherical composite proppants may comprise a thermoset nanocomposite particulate substrate where the matrix material comprises a terpolymer of styrene, ethylvinylbenzene and divinylbenzene, and carbon black particles possessing a length that is less than 0.

Abstract: A recovering system includes at least one shale shaker having at least one screen and a hydrocyclone manifold system; a recovery tank having a cavity and a base, the tank having at least one inlet and at least one outlet, the recovery tank having at least one agitation system for creating force within the cavity of the recovery tank; and at least one recovery shaker having at least one screen.