The Schlumberger CHDT* Cased Hole
Dynamics Tester is a technologically
advanced tool capable of measuring
multiple pressures and sampling fluids
behind a cased wellbore. Developed
with support from the Gas Technology
Institute (GTI), the CHDT tool has the
unique ability to drill through a cased
borehole and into the formation, per-
form multiple pressure measurements,
recover fluid samples and then plug
the hole made in the casing.
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