How to deal with the problem of mud leakage during the use of drilling fluid shale shaker

How to deal with the phenomenon of mud leakage during the use of drilling fluid shale shaker? The occurrence of this phenomenon is mainly related to factors such as high solid content in drilling fluid, high mud viscosity, dispersion of drilling cuttings, which are screened materials; It is related to the inherent conditions of low vibration force, high mesh size, small mesh area of the vibrating screen; The direction position of the liquid inlet of the vibrating screen during on-site installation are also closely related, can be analyzed gradually the following points. Drilling mud additives

One point is that the selected mesh size is reasonable. Each vibrating screen has a processing capacity of 50L/s, which is because the conditions for testing the processing capacity are based on national standards: a 60 mesh sieve is selected, the mud is weighed at a specific gravity of 1.8. The mud viscosity is determined by the presence of different particle sizes of river sand in the mud.

Due to the rapid drilling of the surface layer, a large amount of solid phase is generated that occupies the effective screen area, so the vibrating screen cannot use a fine screen in shallow well sections. Therefore, in the early stages of drilling, larger mesh screens should be used, as the drilling depth increases, finer mesh screens should gradually be used.

Secondly, the formation mud conditions affect the processing capacity. Due to the insufficient dissolution of the drugs added to the drilling fluid the paste on the sieve, serious slurry leakage may occur. The drug should be fully dissolved before use, a larger mesh sieve should be used. On the other hand, when drilling into loose sandstone quicksand layers, sand particles are prone to getting stuck in the sieve holes, causing screen blockage. Therefore, it is necessary to test several different mesh sizes of screens to reduce screen blockage.

Three points, check if the motor's steering is correct. Firstly, remove the vibrator cover check whether the eccentric blocks of both motors rotate outward in both directions. Secondly, if the steering is incorrect, please replace any two phase wires in the incoming power supply of the electronic control box. Wrong method one (two motors rotating inward), although it can also remove drilling debris outward, the speed is slow; Wrong method 2 (two motors rotating in the same direction), with very low vibration force basically no sand discharge mud treatment.