Drilling fluid shale shaker can eliminate the size of solid phase particle relies the size and shape of screen. Field dates show that, using 12 mesh shale shaker can eliminate the solid phase 10% which in drilling fluid. In order to use more and fine drilling cuttings to be eliminated, we should use 80-120 mesh screen.
However, it has some problems; the screen area of fine screen is smaller than normal screen, then the capacity is decreased; the strength of fine wire is lower, so the service life is shorter than normal screen; when high viscosity drilling fluid pass the fine screen, the screen hole is easy to be blocked, even is completed pasted, then produce the bridge paste phenomenon。 ing drilling mud shale shaker,drilling fluid mud cleaner,desander, desilter,drilling fluids decanter centrifuge,vacuum degasser,mud tanks,mud gun,mud agitator,drilling mud centrifugal pumps and all the other solids control equipment,complete solids control system,etc
In order to increase the service life and anti-clogging ability, the field often uses the laminate screen, the bottom wide meshed screen has the support action, there are double levels and multilayer screen. Usually the superstratum use the coarse screen, lower levels use the fine screen.
The coarse screen clean the coarse solid phase can decrease the shoulder for lower screen, so that it can efficiency eliminate the fine solid phase. The shortcoming is it is difficult to clean, maintenance and replace the lower screen.
Because the screen is more fine more easy to be blocked, so the amplitude of fine shale shaker is higher than normal screen. According the high amplitude to vibrate can decrease the blocking degree and prevent the bridge paste phenomenon.
When choose drilling fluid shale shaker, we should accord the solid phase particles distribution to choose the suitable screen, we also should consider the licensing throughput of screen. The capacity of mud screen can adapt the maximum discharge in drilling process. The factor of influence drilling fluids shale shaker capacity, its self motion parameter, the types, density, viscosity, solid phase size distribution, content and screen hole size of drilling fluid. The screen is more fine, the viscosity is more higher and the capacity is less. Usually, the viscosity every 10% increase, capacity will decrease about 2%. In order to meet the requirement of big discharge, sometimes need 2 or 3 sets of shale shaker parallel uses.