Patent ID: 7234522
Filing Date: 2007-06-26
Classification: E21B

Abstract:
1. A method of cementing a casing in a wellbore comprising the steps of: providing the casing with a drill bit on an end thereof; drilling the wellbore with the drill bit attached to the casing; disconnecting the drill bit from the casing when the wellbore has been drilled to a desired depth without removing the casing from the wellbore; connecting a float apparatus to a packer assembly, wherein the packer assembly has a flow passage defined therethrough; lowering the packer assembly and float apparatus into the casing; setting the packer assembly in the casing so that the packer assembly engages and seals against the casing; and flowing cement through the flow passage in the packer assembly and the float apparatus so that the cement moves into an annulus between the casing and the wellbore.