The centering of the casing in the wellbore is one of the decisive factors for the quality of the wellbore cementing, and the centralizer placement is the basis for the casing centering. The performance of different types of centralizers has the ability to enter and ultimately center the casing.

There are different effects; various types of centralizer combinations can make up for the defects of single centralizer for the casing and casing centering operation; casing centralizer spacing design and casing centering, casing damping, righting Self-locking

So closely related. The basic elastic coefficient of the centralizer is the basic parameter for determining the deformation of the well. The specific deformation is determined by the force condition. When the casing centering is less than the positive force, the casing is well centered. When the lateral force is greater than the positive force, The casing is well centered. When the lateral force is greater than the righting force, the centralizer begins to deform and the centering degree begins to decrease. The determination of the reasonable spacing of the casing centralizer must be carried out on the basis of proper handling of the casing deformation and force model. It is necessary to consider the casing centering degree, and also consider factors such as preventing the deadlock of the centralizer and the friction of the casing.

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