دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: refer tofractured formation

n: the quantities of whole mud lost to a formation, usually in cavernous, fissured, or coarsely permeable beds. Evidenced by the complete or partial failure of the mud to return to the surface as it is being circulated in the hole. Lost circulation can lead to a blowout and, in general, can reduce the efficiency of the drilling operation. Also called lost returns. low vapour pressure liquid

n: the loss of quantities of whole mud to a formation owing to caverns,fractures or highly permeable beds,also referred to as lost returns.

during circulation, when less fluid returns to the surface than was injected into the well. Severe lost circulation is the loss of all returns.