دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a logging method that records drift angle, or deflection from the vertical, and direction of the drift. A singleshot directional-survey instrument makes a single photograph of a compass reading of the drift direction and the number of degrees the hole is off vertical. A multi shot survey instrument obtains numerous readings in the hole as the device is pulled out of the well. See directional drilling.

n: A method of measuring the inclination and direction of the wellbore by using a downhole instrument. The well must be surveyed at regular intervals to plot its course accurately.

a measurement of the well path that records the inclination and azimuth of the wellbore using a compass or other device.