Patent ID: 8657004

Claim:
A method of cementing a stage of a wellbore comprising: (a) providing a downhole tool having an annular casing box section with an end adapted for connection to a casing string, an annular mandrel section having an end coaxially coupled to an end of the casing box section distal from the end adapted for connection to a casing string, a tubular body slidingly coupled with an end of the mandrel section distal from the end coupled to the casing box section, an aperture formed radially through a side wall of the mandrel section, and a port formed radially through a side wall of the tubular body; (b) placing the tool integral with a casing string; (c) inserting the casing string in the wellbore; (d) flowing cement within a bore that extends through the casing string and tool; (e) obstructing the bore within the tool; (f) registering the aperture and port by lowering the casing string; and (g) directing cement through the registered port and aperture.