Bow Spring Centralizers API spec solid Rigid spiral Casing Centralizer Casing centralizer is mainly used for centralizing of the well which needs 4"casing because of the deformation of 5 l/2"casing and sidetracking well. Casing centralizer is mainly composed of main body, slip centralizer bush, piston and self-blocking mechanism and so on. It is simple structure, flexible piston and good tightness. Small OD makes it is not easy to be blocked
){kind=link}