دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a nometrievable type of packer that is very reliable but must be drilled or milled out for removal. Most permanent packers are seal-bore packers.

n: after this kinds of packer lower in hole , it no longer take out. Drilling it or milling out when it no using. Most of which uses naked well.

a reliable packer designed and intended to be left in place for a long period of time that seals and holds pressure or resists movement from both directions.