How to deal with Shale Shaker pulp runout?

The drilling fluid Shale Shaker is the most commonly used solid control equipment in oil drilling mud purification systems. It uses an excitation motor and is suitable for single, double or triple oil drilling fluid purification. At the same time, the drilling fluid Shale Shaker can also be used in mud cleaners. Used for underflow Shale Shakers. The drilling fluid Shale Shaker has high vibration intensity, large screening area, adjustable screen box angle, compact structure, and excellent performance. The drilling fluid Shale Shaker is widely used in oil drilling, trenchless horizontal directional crossing, coal bed methane drilling, and shale gas. Drilling, river silt environmental protection and other fields of mud purification treatment.

Various problems will arise during the use of Shale Shakers. Among them, through analysis and summary one by one, the main reasons for the occurrence of pulp running are as follows:

1. Drilling fluid factors:
*High solid content in drilling fluid;
*Mud specific gravity is too large;
*Mud viscosity is high;
*Drill cuttings are dispersed.

2. Factors related to drilling fluid Shale Shaker performance:
*The vibration force of the Shale Shaker is small;
*The mesh size of the screen is too high;
*The effective area of the screen is small;
*The choice of vibration trajectory determines the mud migration speed.

3. Factors related to the use and maintenance of drilling fluid Shale Shakers:
*The elevation angle of the screen box is adjusted too small;
*The vibration motor rotates in the wrong direction;
*The pulp supply volume is too large and exceeds the maximum processing capacity of the Shale Shaker;
*The mesh of the screen mesh is clogged, and the screen mesh is not rinsed with clean water in time after use, causing the mud to dry and solidify;
*When the mud performance changes, the percentage of the vibration motor eccentric block is not adjusted accordingly;
*Installation problem: The direction and position of the liquid inlet of the Shale Shaker are improperly installed;

Measures to deal with the phenomenon of Shale Shaker pulp running:
1. Replace the screen:
The processing capacity of each Shale Shaker is 50L/s. This is because the conditions for the processing capacity test are based on the national standards: select a 60-mesh screen and test the mud with a specific gravity of 1.8. The viscosity of the mud is that the mud contains different particle sizes. river sand. Due to the rapid drilling of the surface layer, a large amount of solid phase is produced and occupies the effective screen area, so the Shale Shaker cannot use fine screens in shallow well sections. Therefore, screens with larger holes should be used in the early stages of drilling, and gradually finer screens should be used as the drilling depth increases.

Because the drugs added in the drilling fluid are not fully dissolved and stuck on the screen, serious mud leakage will occur. You should wait until the drug is fully dissolved before use, or use a larger-pore mesh. In another situation, when drilling into a loose sandstone layer or quicksand layer, the sand particles are easily stuck in the screen holes, causing screen clogging. Therefore, it is necessary to test several screens with different mesh sizes to reduce screen clogging.

2. Check the motor
First, remove the vibrator shield and check whether the eccentric blocks of the two motors rotate outward. Secondly, if the direction of rotation is wrong, please exchange any two phase wires in the incoming power supply of the electric control box. Wrong way one (the two motors rotate inward), although the drill cuttings can be discharged outward, but the speed is slow; wrong way two (the two motors rotate in the same direction), the vibration force is very small, and there is basically no sand discharge or mud processing. .

3. Check the amplitude of the Shale Shaker:
The larger the vibration amplitude, the greater the processing capacity. The vibration force is adjusted to 90% at the factory. If slurry running occurs, the angles of the inner and outer eccentric blocks can be aligned, and the vibration force will be 100%. (At this time, the mud processing capacity only increases by about 15%)

4. Check the liquid flow distribution
For a Shale Shaker with a hook-edge screen structure, the screen surface on both sides is lower than the middle, and mud easily flows to both sides and escapes. It should be ensured that the mud enters the screen frame from the middle. At this point, two options can be adopted. The first is to adjust the front spring seat to appropriately raise the angle of the front of the screen box; the second is to adjust the position of the flip plate of the extension slot to control the liquid flow distribution.

The main reason why the drilling fluid Shale Shaker runs out during use is sometimes caused by one of the aspects, and sometimes it is caused by multiple aspects. We hope that users can analyze the causes promptly and accurately, eliminate faults, and protect the equipment. 

HL Petroleum is a professional solids control equipment manufacturer.We have more than 20 years of research, design and manufacturing experience.The main products include Mud Shale Shaker,Vacuum Degasser, Mud Cleaner, Centrifuge, mud agitator, Mud Gun, jet Mud Mixer, Centrifugal Pump, Shear Pump, Spray Pump, Vacuum Pump, Mud Gas Separator etc. These products are widely applied in various fields, such as oil drilling, HDD, mineral separation, CBM exploration, river sand separation.

HL Mud Shale Shaker are professional, reliable, cost-effective and customizable. If you are interested in our equipment,please contact us.