دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: to enlarge the wellbore below the casing.

n: To enlarge a wellbore past its original drilled size. Underreaming is sometimes done for safety or efficiency reasons. Some well planners believe it is safer to drill unknown shallow formations with a small-diameter bit, and if no gas is encountered, to t

n: a device used to underream. See underream.

n: The tool that be used to enlarge the diameter of borehole for tripping in casing easily.

n: the amount by which the indicated volume registered by a meter is less than the actual volume that has passed through the meter. Determined by means of a suitable standard device. Compare overregistration.

n: The grain that can pass the mesh of seperation screen.

n: The diameter of the core smaller than the inner barrel caused by the core be grinded .

n: It is caused by the force of tongs smaller than the norminal torque.

lease acreage on which wells have not been completed to a point of testing or allowing production.

Undeveloped reserves are expected to be recovered: (1) from new wells on undrilled acreage, (2) from deepening existing wells to a different reservoir, or (3) where a relatively large expenditure is required to (a) recomplete an existing well or (b) insta

that quantity of hydrocarbons estimated yet to be discovered.