The centralizer product has undergone many changes from its birth to the present. Of course, we have also gained a lot from these changes, which is also an accumulation of experience. However, we still have to pay close attention to the birth speed of new type centralizer products, because we have to catch up with market demand. Let's take a look at the common casing centralizers, rigid centralizers and elastic centralizers.

The elastic centralizer is mainly made of spring steel, with a large degree of deformation, a large maximum expansion diameter, and a large supporting force after expansion. Because the elastic centralizers have different opening and closing degrees, the elastic casing centralizers can adapt to different degrees of expanded boreholes. In addition, the elastic centralizer is basically in a closed state when downhole, and the maximum outer diameter of the initial state is small, which reduces the risk of jamming and obstruction during downhole.

The material of Rigid centralizer is mainly cast steel. Compared with the elastic centralizer, Rigid centralizer has high rigidity, and the centralizer ribs are easy to damage the well wall, and when it is stuck, it is not conducive to the rotation of the casing and affects the implementation of the rotary liner cementing and casing rotary cementing process. . However, in some specific wells, the Rigid centralizer is an indispensable device.

In short, different drilling wells use different types of Rigid centralizer. When choosing, in addition to selecting the model, the material and production process should also be considered as appropriate.