The material of the rigid casing centralizer is mainly cast steel. Compared with the elastic centralizer, the rigid centralizer itself has high rigidity, and the centralizing rib is easy to cause damage to the well wall, and when it encounters a blockage, it is not conducive to the rotation of the casing, affecting the rotary liner cementing and the casing rotary cementing process. implement. However, in some specific drilling, rigid casing centralizers are indispensable devices.

The casing centralizer is a cementing tool device installed on the drilling casing string to center the casing string in the wellbore. Compared with other cementing tool accessories, the casing centralizer has the characteristics of long service life, simple structure, convenient use and low cost.

The elastic casing centralizer is mainly made of spring steel, which has a large degree of deformation, a large maximum opening diameter, and a large supporting force after opening. Due to the different opening and closing degrees of the elastic centralizer, the elastic casing centralizer can adapt to different degrees of expansion of the wellbore. Moreover, the elastic righting sheet is basically in a folded state when going downhole, and the maximum outer diameter is small in the initial state, which reduces the risk of getting stuck and blocked when going downhole.