Perhaps unsurprisingly, Transocean rejects the report as self-serving, and points to issues with the well’s design, as well as to the cement log, as deserving much more scrutiny.

The purpose of cement bond log (CBL) under increasing borehole pressure is to differentiate micro annulus from bypass channel.

Sector Cement Bond Tool(SBT) is an acoustic log tool for inspecting quality of the cement bond around the circumference of the casing tubing ans for measuring the pore paths.