When the casing is run into the drilled hole it is desired that casing string must be aligned with the centre of the hole and the casing can be rotated during cementing operations. This ensures the placement of cement slurry uniformly around the casing for a good cement bonding between casing and borehole. SPECTRUM has developed Casing Bushing Model SDTICB is a split bushing and is also interchangeable with Varco Casing Bushing. Casing Bushing is designed to handle string load up to 500 tons.

Different sizes of insert bowls can also be used in these bushings to lower different sizes of casing pipes.