Development well
18 July 2017Deviation survey
18 July 2017Development well
18 July 2017Deviation survey
18 July 2017Departure of the wellbore from the vertical, measured by the horizontal distance from the rotary table to the target. The amount of deviation is a function of the drift angle and hole depth. The term is sometimes used to indicate the angle from which a bit has deviated from the vertical during drilling. See deviation survey.
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