دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a stage tool.

n: a device that pem1its cement to be displaced in stages at two or more points above the bottom of the string. Instead of all the cement being pumped out the bottom, a stage tool allows some of the cement to be pumped out at several points above the bottom. Used in cases in which a long column of cement might cause formation breakdown if the cement were displaced from the bottom of the string.

n: a special tool used in stage cementing.

a alternate path device that allows access into the annulus when shifted. Used in two stage cementing operations to pump the upper job.