| http://www.w3.org/ns/prov#value | - The drilling fluid is circulated downwardly through the interior of the pipe and upwardly through the annulus between the exterior of the pipe and the walls of the wellbore, while removing drilling solids, gas, filter cake, dehydrated drilling fluid, gelled drilling fluid, cuttings, and any other debris needing to be removed from the wellbore.
|
