Patent ID: 7231977
Filing Date: 2007-06-19
Classification: E21B

Abstract:
1. A method of creating a casing in a borehole with an interior wall located in a subterranean formation, comprising: (a) drilling a borehole with a drill bit on a drill string; (b) placing settable material into an annulus within the borehole to a desired fill height wherein the settable material sets on at least a portion of the interior wall of the borehole to create a liner along the at least the portion of the interior wall of the borehole; (c) moving the drill string to prevent the settable material from completely plugging the borehole; (d) circulating drilling mud containing a set retarder to remove the unset settable material near the drill string; and (e) repeating steps (c) and (d) until the lining has hardened.