The casing centralizer is used to centralize the casing in the bolehole to ensure the even solidification of cement slurry within the annular,which can improve the cement job quality.

• 套管扶正器的作用是使套管在井眼内居中,保证固井时水泥浆均匀凝固在套管与井壁所形成的环形空间内,从而提高固井质量。