| http://www.w3.org/ns/prov#value | - Specifically, one or more of the following embodiments or other possible embodiments of the present invention are believed to represent an advancement in the art and/or are believed overcome one or more of the disadvantages of current drilling systems and provide a top drive system that (1) is more simple and safe than conventional systems; (2) reduces the awkwardness of handling drill pipe; (3) e
|
