1. Weak capacity of oilfield drilling solids control equipment:

It should be taken into consideration how much the fluids can be injected into mud tanks according to equipment’s actual capacity and how much the flow rate is in mud agitator in order to guarantee the quality of processing the fluids.

2. Return of the rough solids removed by screen in oilfield mud cleaner:

If the liquid flow all returns to the system, that means nothing has been taken away. Thus, the solid particles left on the screen of mud cleaner ought to be removed.
 

3. Installation of vacuum degasser at the downstream of hydrocyclones:

If the degasser is placed behind the equipment supplied by centrifugal pump, the pump can be blocked by entraining gases. Entrained fluids will reduce its flow rate and working efficiency of hydraulic cyclones. If the gases are poisonous, it is better to remove them in the first mud tank rather than the third or the fourth one.

4. Shared suction tank for drilling desilter and desander:

If the desilter and desander share a sunction tank, then half drilling fluids is treated by desilter and another half by oilfield desander. That means, 50% of the fluids pumped into the well is not treated by desander and another 50% not by desilter, thus betraying the basic rule of successive treatment and disabling the desamder to effectively reduce the solids load in mud desilter.

5. Two centrifugal pumps in parallel to supply the same equipment:

It is commonplace in the configuration of drilling mud solids control system because, with 30m pressure head and 25L/s funnel nozzle, two centrifugal pumps installed in parallel are equal to a pump with 30m pressure head and 25L/s funnel nozzle. If the single pump does not have required pressure head of the equipment, then it is not proper to place another one in parallel, but rather to examine if it is in good condition. If it is but the pressure head is still not up to the scratch, then replace the propeller with a larger one.