دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in perforating, the distance a jet or bullet must travel in the wellbore before encountering the wall of the hole.

n: The distance between the external surface of a logging tool and the borehole wall. This distance has an important effect on the response of some logging measurements, notably induction and neutron porosity logs.


the clearance from casing to the tool face.

n: difficulty in obtaining proper penetration with a tubing perforating gun in casing due to the casing guns lying against one side of the casing because of hole deviation.