Inclinational Deviation

Published: May 13, 2017 | Last updated: July 5, 2023

What Does Inclinational Deviation Mean?

Inclinational deviation (msID) refers to the differences between the vertical angles of actual and planned directional drilling paths. The word inclination is used to describe anything related to vertical angles. In technical hole deviation technology, inclinational deviation deals with vertical angles determined during directional drilling operations. Inclinational deviation is one of the four components of angular deviation.


Trenchlesspedia Explains Inclinational Deviation

Inclinational deviation allows for precise calculations which are a part of hole deviation logging and directional drilling, and is used to calibrate a bore path in real time. Calculations include both lineal and angular deviation. Angular deviation covers inclinational and azimuthal deviation and includes:

  • msID – inclinational deviation
  • RCID – relative change in inclinational deviation

Hole deviation technology makes it possible for drill operators to adjust and improve geosteering response and evaluate the effectiveness of the drilling process. The evaluation of angles provides greater detail beyond lineal deviation measurements.


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