| http://www.w3.org/ns/prov#value | - The interrelatedness of these functions can be seen by the fact that the unwanted materials to be removed at the surface can include not only cuttings" from the material through which the bit is passing, but also pieces of the drill bit itself, the barytes or other weighing materials, and substances such as gellants, dissolved gases, and salts created when other fluid constituents become "spent
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