دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see mutiple-shot survey.

n: a directional survey that provides a record of drift angle and direction at various depths in the hole. See directional survey.

n: A technique for determining the deviation of a wellbore. The multishot tool provides more accuracy than the single-shot tool and is usually used in highly deviated wells.

n: see two stage cementing.

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 centrifugal pump that develops pressure by means of impellers operating in series. Also called pump stage. See electric submersible pumping.