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Precautions for the use of oil drilling fluid centrifuges

The drilling fluid centrifuge is a five-stage solid-phase particle control equipment in the drilling mud solids control system. It uses the principle of centrifugal sedimentation to separate the suspension in the drilling fluid. The drilling fluid centrifuge is mainly used for: balancing the viscosity and specific gravity of the drilling fluid, and recovering the heavy gold stone powder in the drilling fluid; it is mainly used to separate the solid phase particles of 2~5μm and 5~7μm in the drilling fluid. One of the important equipments in the field of mud treatment. So what should we pay attention to when using drilling fluid centrifuges?

BZ Drilling Fludi Decanter Centrifuge

Due to the high-speed rotation of the drum, the liquid and solid phases of the drilling fluid obtain a large centrifugal force. The difference between the centrifugal forces of the liquid and solid phases is the centrifugal sedimentation force acting on the particles, which separates the solid-liquid. Due to the high-speed rotation of the centrifuge, the sedimentation velocity of the particles in the centrifuge is far close to the centrifugal sedimentation velocity, so in general, only centrifugal sedimentation is considered in the drilling fluid centrifuge.

Precautions for high-speed drilling fluid centrifuge:

1. Use the tools correctly to install the rotor of the required specifications accurately; check whether the rotor is installed firmly; whether there is foreign matter falling into the machine cavity; and nothing should be placed on the cover. The outer wall of the centrifuge tube must be wiped dry and placed in the rotor symmetrically.
2. The speed setting should not exceed the maximum speed to ensure safe operation; be sure to tighten the rotor cover before starting the machine to avoid accidents caused by flying out during high-speed rotation.
3. In order to improve the separation efficiency of the centrifuge, the viscosity of the drilling fluid entering the centrifuge must be controlled, so it is generally diluted with water to keep the viscosity within the range of 35-37s. The adding speed of dilution water is 0.38-0.50L/s.
4. In order to ensure the centrifuge works effectively, the input speed of drilling fluid should not exceed the recommended maximum range, that is, the centrifuge should not be overloaded. The recommended values ​​of drilling fluid input are shown in the table below.
5. The centrifuge should not run for more than 60 minutes at a time.
6. After each operation, a detailed record of the use of the centrifuge should be made.
7. When the drilling fluid centrifuge treats the drilling fluid in use, generally some bentonite should be added to the drilling fluid regularly. If it is not replenished in time, the viscosity of the drilling fluid will decrease and the filtration loss will increase. Of course, whether or not to add bentonite depends on the properties of the drilling fluid.

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