Circulation tool for use in gravel packing of wellbores

An apparatus for use in wellbores that enables the running in, washing down, gravel packing, reversing excess slurry, and the spotting of post gravel pack fluids on a single trip. The apparatus comprises a housing (40) having an exterior and a longitudinal bore (42) extending therethrough, and a lateral port (44) providing a communication path between the housing longitudinal bore and the exterior of the housing. A first sleeve (46) is disposed within the housing longitudinal bore that has a longitudinal passageway therethrough and is movable between an upper position and a lower position relative to the housing (40). First (48) and second (50) lateral passageways extend through the wall of the first sleeve. A second sleeve (54) is disposed within the first sleeve (46) and also has a longitudinal passageway therethrough. The second sleeve is movable between an upper position and a lower position relative to the first sleeve. First and second passages extend longitudinally through the housing.