Patent ID: 8789610

Claim:
A method of casing a wellbore, comprising: mounting a casing shoe having at least one cutting structure on an end of a section of casing; advancing the section of casing with the casing shoe thereon into a wellbore; selectively increasing a rate of corrosion of a body of the casing shoe within the wellbore to at least partially corrode the body of the casing shoe, wherein selectively increasing the rate of corrosion of the body comprises increasing a rate of corrosion of a corrodible matrix phase comprising at least one of a ceramic and an intermetallic compound in which a metallic phase is dispersed by selectively increasing the rate of corrosion of the corrodible matrix phase dispersed between adjacent discrete metallic particles of the metallic phase and liberating particles of the metallic phase from the corrodible matrix phase without substantially increasing a rate of corrosion of the metallic phase; and advancing an additional section of casing or drill pipe through the end of the section of casing and the at least partially corroded body of the casing shoe.