دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a tool that, when lowered into the wellbore, makes a photographic record of the angle and drift of the wellbore;that is, it records the number of degrees the hole is off vertical and the direction in which it is off vertical. Several types of instrument are available;some are capable of photographing only a single record - single-shot survey instrumentswhereas others are capable of making several records in one run - multishot survey instruments.

n: It can measure the angle of inclination and azimuth of a point in the borehole.

n: a directional survey instrument used in combination with a deflected downhole motor. It shows, on a rig floor monitor, the inclination and direction of a downhole sensing unit.

n: It is consists of down hole equipment ,surface equipment and electric cable.