Patent ID: 7066252

Claim:
A tool for use in excluding solids in a downhole production environment, the tool being placed in a borehole in an earth formation, the earth formation having at least one perforation in one or more zones of the formation for the production of hydrocarbons, the tool comprising: a tool body having an axial and radial passage, a top, having at least one upper circulation port, and a bottom, having at least one bottom circulation port, and a sidewall filter media portion, the filter media having selected flow characteristics, including porosity, permeability and a pore size, chemical resistance, directional flow and shape properties, fluid circulating means for circulating fluids external to the tool body thereby enabling cleaning of the filter media and/or annular space formed between the tool body and formation wherein the fluid circulating means external to the tool body comprises: (a) said top is in communication with memory metal rods which, when heated, activate a shut off opening sleeve that in a first position covers upper circulation port(s); and (b) said bottom is in communication with a disc, which in a first position covers lower circulation port(s), wherein said disc is held in position by a compression spring.