دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a drilling operation in which the drilling fluid is not returned to the surface;rather. it flows into an under- ground formation. Sometimes blind-drilling techniques are resorted to when lost circulation occurs.

n: a drilling operation in which no fluid is circulated back up to the surface (often as a result of lost circulation). However, fluid is usually circulated into the well to cool the bit. See blind drilling.

n: drilling without drill fluid cycling out of the well