Conventional: The operation by which a cement slurry is pumped down a string of tubing and displaces the annular space to a predetermined height above the end of the cement string. In drilling and completion operations, cementing is used to secure the casing in place and isolate formations for control of fluids. In remedial operations cementing is used to seal holes in the wellbore for fluid control. Squeeze:The process of forcing cementing material under pressure into a specific portion of a well, such as fractures, openings, perforations or other permeable zones.