Drilling Industry Glossary
magnetometer
make up
make up a joint
make up torque
marsh viscosity
MD
mechanical jar
MSL
micro-annulus
mouse hole
mud
mud cake
mud ditch
mud engineer
mud line
mud magnet
mud pump
mud report
mud tanks
mud weight
Micro-annulus
During cementing job, if the displacing fluid (cement slurry) fails to completely remove mud and/or spacer, a small layer of the mud and/or spacer remains on the walls of the annulus or the formation. Once the cement sets, the space occupied by the small layer of mud and/or spacer can lead to the creation of a "micro-annulus". It normally occurs on the narrow side of the annulus.
You may also be interested in: