A method of enabling gravel packing of a wellbore

A method that enables gavel packing a wellbore whilst also removing of filter cakes. The method comprises inserting a service tool into the well to a desired location, gravel packing the well, and circulating fluids within the wellbore through the service tool to dislodge and remove filter cake residue. The gravel packing can comprise flowing a gravel laden slurry through the service tool, thereby selectively depositing gravel within the well. The service tool can define multiple, selectable flow paths through which fluids and slurries can flow. The service tool comprises cylindrical housing 40 having an exterior and a longitudinal bore 42. A lateral port 44 is between the housing longitudinal bore and exterior of the housing. A first sleeve 46 within the housing longitudinal bore 42 and having a cylindrical wall and a longitudinal passageway is movable between an upper position and a lower position relative to the housing. First 48 and second 50 lateral passageways extend through the wall of the first sleeve 46. A second sleeve 54 is disposed within the first sleeve 46 and having a longitudinal passageway is movable between an upper position and a lower position relative to the first sleeve 46.