METHODS AND APPARATUS FOR WELLBORE CONSTRUCTION AND COMPLETION

摘要

The present invention relates methods and apparatus for lining a wellbore. In one aspect, a drilling assembly having an earth removal member and a wellbore lining conduit is manipulated to advance into the earth. The drilling assembly includes a first fluid flow path and a second fluid flow path. Fluid is flowed through the first fluid flow path, and at least a portion of which may return through the second fluid flow path. In one embodiment, the drilling assembly is provided with a third fluid flow path. After drilling has been completed, wellbore lining conduit may be cemented in the wellbore.

主权项

1. A method of cementing a wellbore lining conduit in a wellbore, comprising:
attaching the wellbore lining conduit to the wellbore; providing a float valve releasably connected to a tubular string; positioning the float valve adjacent a lower portion of the wellbore lining conduit; sealing an annular area between the float valve and the wellbore lining conduit; supplying cement through the float valve to an annular area between the wellbore lining conduit and the wellbore; releasing the tubular string from the float valve; and closing the float valve.