Drilling fluid desanders can encounter a number of problems during use. Today, I’ve summarized some desander troubleshooting issues that customers have encountered, hoping it will be helpful.
A drilling fluid desander is a secondary solids control device in the solids control system. It separates solid particles between 45 and 74 microns and ensures that the treated mud is properly processed by the desander.
Understanding common desander troubleshooting issues, their causes, and solutions will help us better utilize the desander to process the mud.
Troubleshooting 1: Discharge outlet adhesion, where liquid and solids adhere to each other.
Cause: Solids overload.
Solution: Reduce the solids content by increasing the number of desander cyclones, inspecting the shaker de schiste for damage, ensuring the shale shaker bypass is closed, and reducing the ROP.
Troubleshooting 2: Excessive fluid loss.
Causes:
A. Low supply head: 1. Partial inlet blockage; 2. Air in the supply pump; 3. Pump speed too slow; 4. Impeller too small; 5. Restriction in the pump discharge line; 6. Incorrect pump direction; 7. Solids deposited in the line.
B. Nozzle too large.
C. Inner cylinder or nozzle wear: 1. Long-term operation under high pressure; 2. Normal wear; 3. Incorrect inlet installation.
Solution:
A. Increase supply head: 1. Install a filter at the supply pump inlet; 2. Adjust and correct; 3. If powered by a diesel engine, increase the pump speed; 4. Increase the impeller size; 5. Inspect the pipeline; 6. Adjust the direction; 7. Clean the pipeline and install a butterfly valve near the suction end.
B. Reduce nozzle size.
C. Corrective measures: 1. Reduce pump speed or reduce impeller size; 2. Reinstall the nozzle; 3. Reinstall.
Fault 3: No fluid is coming out of the desanding cyclone nozzle. This may be due to a clogged nozzle or excessive inlet pressure.
Causes: Mud is too dirty, causing intermittent operation of the solids control equipment; mud has dried out in the cyclone désableur; the shale shaker cloth is broken or the shale shaker is bypassing; the pump speed is too high; the impeller is too large; the throttle valve is incorrectly positioned.
Solution: Shut down the equipment, clear the nozzle blockage, and remove the blockage by disassembling the upper flange. Check the vibrating screen cloth, increase the nozzle size, and start the equipment while circulating. If the equipment is driven by a diesel engine, reduce the pump speed, reduce the impeller size, and adjust the valve opening.
In addition to the faults mentioned above, other faults may occur during the use of the drilling fluid desander. If you cannot resolve a fault, please contact our technicians, [email protected] as we specialize in dessableurs.
