Patent ID: 7032668

Claim:
An apparatus for cementing an annulus between a tubular liner and a wellbore including a preexisting wellbore casing, comprising: a tubular support member; a wiper plug releasably coupled to an end of the tubular support member; a tubular liner releasably coupled to the tubular support member; a landing collar defining a restricted passage coupled to an end of the tubular liner; a cementing plug for sealingly engaging the tubular liner and releasably coupled to the wiper plug, comprising: a plug body defining a plug passage; a valve for controlling the back flow of fluidic materials through the plug passage; and a fluid injection assembly coupled to the tubular support member for injecting fluidic materials into the tubular support member and controllably releasing a ball and a pump down plug into the tubular support member for engaging the cementing plug and the wiper plug.