2015年8月26日星期三

Maintenance of all drilling fluids mud cleaner assembly

As one of the important equipment for solid/liquid separation system, the drilling mud cleaner, also called desander and desilter assembly, mainly consists of three parts including desander, desilter and the underflow screen. It can achieve separation of two stage with the hydrocyclones mounted over the shale shaker. Compared with the independent desander and desilter, the product has much higher working efficiency. Same as the shale shaker in function, the equipment is designed rationally with compact structure, small volume and powerful performance.
In mud system, using a oilfield mud cleaner is to send the mud through a hydrocyclone, because it would be too thick for the cleaner to effectively work with. A hydrocyclone is a device that uses force to push purified mud through the top of the cyclone as thicker particles pass through the bottom section. Anything that goes through the bottom section will meet the mud cleaner.
While a hydrocyclone can help purify mud to some extent, the mud cleaner is responsible for purifying the mud even further. The drilling fluids cleaner is little more than a mesh with fine holes made to let tiny particles pass through. Anything that is tiny enough to pass through the holes will meet and blend with the purified mud expelled from the hydrocyclone.
Maintenance of all drilling fluids mud cleaner assembly as follows:
1. Vibration motor maintenance
(1) Clean dust on shell regularly.
(2) Before operating, the bolts must be checked to confirm whether there is loose or not. Otherwise, we must screw bolts tight before running shaker.
(3) Inspect the cable, whether it is worn, held down, crushed, etc.
(4) The vibration motor should be under good lubrication during operation motors before being fixed on shaker, the bearing is filled with SKF specific lubricate grease, the temperature range is -40 ~ 200℃.
2. Shaker screen maintenance
(1) Before every shut off, the shaker should run without any load for 5-10 minutes, at the same time, use clean water to flush screen clean.
(2) Every time finish operation, the shaker frame and screen should be flushed by water. Please replace new screen or repair the damaged screen once it is found damage, otherwise large cutting may drop into the clean mud and influence the following process.
3. Wear parts replacement

The user should check and replace the wear parts regularly, except for vibration motor, shaker screen, electric cabinet mentioned above. Locking wedge, composite vibration spring, sealing rubber should be replaced at once.

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