Drilling Industry Glossary
tail cement
tension limit
tie-back liner
ton-mile
TOC
TOL
torque
torque and drag
total depth (TD)
traveling block
trip in
trip out
true vertical depth (TVD)
tungsten carbide
True Vertical Depth (TVD)
This is the vertical distance from the wellhead to a point in the wellpath. This quantity is calculated from the directional survey data. Note that a measured depth, due to the wellbore curvature, is always greater than the corresponding true vertical depth. It is commonly referred as TVD.
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