Drilling Industry Glossary
magnetometer
make a connection
make up
make up a joint
make up torque
make up water: chlorides
making a trip
making hole
making up a joint
marsh viscosity
MD
mean sea level (MSL)
mechanical jar
methylene blue
micro-annulus
migration
mixing mud
monkey board
mouse hole
mud
mud alkalinity
mud cake
mud ditch
mud engineer
mud line
mud magnet
mud pump
mud report
mud tanks
mud type
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: