Casing centralizers, also known as drilling centralizer, are important cementing tools to position the casing uniformly inside the wellbore to offer a more uniform distribution of cement slurry around the casing. They can also reduce the friction between casing and wellbore and keep the casing from hitting the wellbore walls.
By this tools, a continuous annular clearance around the casing allows the cement to completely seal the casing to the casing to the borehole wall.
The primary function of centralizers is to keep the well casing and screen assembly centred in the borehole. “Maintaining an even grout cover during construction is important in achieving casing integrity.
