The casing centralizer is a device installed on the casing string to center the casing string in the borehole. It is one of the casing accessories.
There are two types: rigid centralizer and spring centralizer.
The casing centralizer has the characteristics of simple structure, easy to use, long service life and low relative cost
The use of casing centralizer can not only ensure that the cement ring outside the casing string has a certain thickness, but also reduce the resistance when the casing is lowered, avoid sticking to the casing, and help improve the cementing quality.
