| http://www.w3.org/ns/prov#value | - As used herein, the term ???work string or drill string??? is understood to include a string of tubular members, such as casing, tubing, jointed drill pipe, metal coiled tubing, composite coiled tubing, drill collars, subs and other drill or tool members, extending between the surface and on the lower end of the work string, a tool normally utilized in wellbore operations.
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