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The angle 

LaTeX Math Inline
body\theta
at which a pipeline or well trajectory diverges from true vertical direction 
LaTeX Math Inline
bodyz(l)
:

LaTeX Math Block
anchor1
alignmentleft
\cos \theta (l) = \frac{dz}{dl}

where 

LaTeX Math Inline
bodyl

path length along the trajectory


Image Modified

Fig. 1. Deviation angle

LaTeX Math Inline
body\theta
along the trajectory


See also

...

Natural Science / Physics / Measuring / Positioning / Trajectory

[  Deviation Data ] [ Azimuthal deviation[ Trajectory ] [ Trajectory azimuth ]