A method and apparatus for conducting earth borehole operations include a reel (28) of continuous coiled casing (30), and an injector (20) for moving the coiled casing. The bottomhole assembly including at least a motor (54) and a bit (56) is connected to the free end of the coiled casing, and injected...http://www.google.com.au/patents/US7481280?utm_source=gb-gplus-sharePatent US7481280 - Method and apparatus for conducting earth borehole operations using coiled casing
