What are the different types of slurry filters?

Mud filter is one of the important equipment in drilling, it is used to filter and clean the drilling fluid to ensure the smooth progress of the liquid phase drilling process. According to different filtering principles and usage occasions, it can be divided into many different types of mud filters.

1. Once-through mud filter

The once-through mud filter is a device that uses one-way water flow for filtration. During the liquid phase drilling process, the drilling fluid passes through the drill pipe and mud pipe from the bottom of the well to the drill bit, and uses the pressure generated by the formation to flow back to the surface equipment and filter through the mud filter. The filtered fluid enters the drilling fluid tank and is recirculated.

2. Pneumatic mud filter

Pneumatic mud filter is a kind of equipment that adopts pneumatic principle to filter. The upper part of the filter is equipped with an inflatable device, and the lower part is a mud flow channel, which cushions the mud through inflation to achieve the filtering effect. Commonly used in low density mud systems.

3. Vortex type mud filter

The vortex mud filter is a device that uses the principle of vortex for filtration. There is a rotating shaft in the center of the equipment, through which the mud can be vortexed to separate the solid particles. The equipment has the advantages of high efficiency and energy saving.

4. Vacuum mud filter

Vacuum mud filter is a device that uses the principle of vacuum adsorption for filtration. The filter is filtered with filter cloth, and the negative pressure generated by the vacuum pump sucks the mud into the filter to filter out the solid particles. The equipment is suitable for occasions such as high-density mud and high-deep wells.

5. Pressure mud filter

The pressure mud filter is a device that uses the principle of pressure difference for filtration. The filter element is used for filtering in the equipment, and the pressure difference is generated by the booster pump in the equipment, and the mud flows over the filter element to filter out the solid particles. The equipment is easy to use and low maintenance cost.

To sum up, there are different types of mud filters, which are suitable for different drilling occasions and filtering requirements. When drilling operators select and use mud filters, they need to select and adjust according to the actual situation to ensure the filtering effect and safe operation.