How to deal with the slurry running of the mud vibrating screen

How to deal with the slurry running of the mud vibrating screen. Recently, the editor of HL found that several people were asking about the problem of slurry running of the vibrating screen. The content hopes to be helpful to everyone.

Drilling fluid vibrating screens will run out of mud during field use. This phenomenon occurs in drilling fluid vibrating screens. This phenomenon is mainly related to factors such as high solid content in the drilling fluid, high mud viscosity, and dispersion of drill cuttings; the low vibration force of the drilling fluid vibrating screen, the high mesh number of the screen, and the small screen area are related to its own conditions; it also has a lot to do with the direction and position of the liquid inlet of the vibrating screen during on-site installation.

The technicians of HL Petroleum have summarized a few points of the phenomenon of mud-slurrying of the drilling fluid vibrating screen and analyzed it step by step, and gave customers reasonable suggestions and references.

1: The mesh number of the drilling fluid vibrating screen is unreasonable. The drilling fluid vibrating screen cannot use a finer screen in the shallow section. A larger screen should be used as soon as the drilling starts. With the gradual increase of the drilling depth, the screen should also gradually adopt a finer screen.

2: During the working process of the drilling fluid vibrating screen, the formation and mud conditions affect the processing capacity. Since the drugs added in the drilling fluid are not fully dissolved and stick to the screen, serious mud running will occur at this time. You should wait until the drug is fully dissolved before using it, or use a larger mesh screen. On the other hand, when drilling into a loose sand-bearing layer or quicksand layer, the sand particles are likely to get stuck in the screen holes, causing screen blockage. Therefore, it is necessary to test several screens with different meshes to reduce the blocking phenomenon.

3: Check whether the steering of the motor is correct before the drilling fluid vibrating screen works. If the steering is wrong, please change any two phase wires in the incoming power supply of the electric control box. Error method 1: Two vibrating screen motors rotate towards the inside, although the drill cuttings can also be removed, but the speed is slow; Error method 2: Two motors rotate in the same direction, the vibration force is very small, and basically does not discharge sand or process mud .

4: When the drilling fluid vibrating screen is working, check whether the fluid flow distribution on the screen frame is reasonable. For the vibrating screen with a hook-side screen structure, the screen surface on both sides is lower than the middle, and the mud is easy to flow to both sides and lose. Make sure that the mud flows from the middle Enter the screen frame. At this time, two solutions can be adopted. One is to adjust the front spring seat to appropriately raise the angle of the front of the screen box; the other is to adjust the position of the turning plate of the extension slot to control the distribution of liquid flow.

5: Check the quality of the screen during the working process of the drilling fluid vibrating screen. The screen is generally composed of the upper sieve layer and the lower stress layer. The two layers should be closely combined. If the bottom stress layer of the screen is tight , The sieving layer is not tightened, the throwing force of drill cuttings is greatly reduced during work, the mud processing volume is small, and the drill cuttings cannot be smoothly screened and removed.