Abstract: As the new drilling technology and technique develop, and the various Shale Shakers come into use, the centrifuge in solids control system makes a higher claim for the operation capability and range; It's difficult to improve the traditional centrifuge because the limitation of technology and structural character itself; the authors of the paper analyze the restrained factor that the processing capacity of the drilling fluid centrifuge can't be raised currently both home and abroad, and presente the operation principle and characteristics of a certern new centrifuge, it is recognized the technical innovation of improving centrifuge processing capacity is scattering feeding, two times acceleration, feeding from the outlet and theframeshaped crew structure. In the meantime, the authors study the internal fluid field in the centrifuge, give out the mathematics model based on the NS equation, redefine a boundary condition according to the work characteristics and get the calculating method for processing capacity. It proves the flexibility of the model through the contrasting data between the calculation and the insitu test.

Key words: solid control, drilling fluid, centrifuge, processing capacity, mathmatic modal