During the process of mud displacement by cementing, using the cyclone centralizer can not only improve the deviation of casings, but also change the flowing profile of the annular fluid to make the fluid helical movement.

Casing swirl centralizer mechanical devicewhich can not only centralize the case pipe, but also alter annular cement’sflow pattern to form turbulence, which can raise cementing quality.

Finite element numerical simulation and experimental research on the forming force of mandreless neck-spinning with single roller;

Defection and process study on thin-wall aluminum tube neck-spinning;

The study on the numerical simulation of non-axisymmetric tube neck-spinning and process parameters optimization;