Patent ID: 7766086

Claim:
An apparatus for diverting fluid flow out of a work string, the apparatus comprising: a top sub having an upper end, a lower end, and a central bore, wherein the upper end is adapted to be connected to a work string; a piston housing, the piston housing having an upper end, a lower end, and a central bore in communication with the central bore of the top sub, wherein the upper end is connected to the lower end of the top sub; an upper piston, the upper piston being movable within the central bore of the piston housing; a middle piston, the middle piston being movable within the central bore of the piston housing; a lower piston, the lower piston being movable within the central bore of the piston housing; a locating sleeve, the locating sleeve positioned within the piston housing, wherein the locating sleeve includes a j-track; a locating pin, the locating pin having a first end and a second end, wherein the first end is connected to the piston housing and the second end is positioned within the j-track; a spring housing, the spring housing having an upper end, a lower end, and a central bore in communication with the central bore of the piston housing, the upper end of the spring housing being connected to the lower end of the piston housing; a spring, positioned within the central bore of the spring housing; a ported housing, the potted housing having an upper end, a lower end, a central bore in communication with the central bore of the spring housing, and a plurality of ports through the housing in communication with an annulus, wherein the upper end is connected to the lower end of the spring housing; a lower sub, the lower sub having an upper end, a lower end, and a central bore in communication with the central bore of the ported housing, wherein the upper end is connected to the lower end of the ported housing and the lower end is adapted to be connected to a work string; a flow tube positioned within the central bores of the piston housing, the spring housing, and the ported housing, the flow tube being connected to the locating sleeve and being adapted to sealingly slide within the central bores of the piston housing, the spring housing, and the portion housing; a flow restriction area located on the flow tube, wherein fluid flow through the flow restriction area provides an increase in pressure above the flow tube within the downhole device; wherein the increase in pressure moves the upper piston, the middle piston, and the lower piston towards the lower end of the piston housing; and wherein the pistons move the flow tube within the downhole device towards the lower sub until the locating pin reaches a shoulder of the j-track.