What is the role of mud material bentonite

Bentonite plays an important role in mud, and its role is mainly reflected in the following aspects:

1. Thickening and suspension: Bentonite has a high degree of moisture absorption and adsorption, can absorb water and

 a variety of inorganic substances, and form colloidal particles,thereby increasing the viscosity and viscosity of the mud. This

 helps to enhance the slurry's suspension and carrying capacity and reduce the settling and deposition of solid particles.

2. Stability of borehole wall: Bentonite can increase the density of mud, so as to achieve the purpose of controlling well pressure

 and borehole wall stability, and ensure the normal drilling

 process. The cementation property of bentonite can form a dense membrane structure to prevent the spilling and leakage of

 solid particles and improve the sealing performance of drilling fluid.

3. Filtration loss reduction function: Colloidal particles formed by bentonite in the mud can block the holes and cracks in the

 well wall to avoid mud loss, thereby reducing the risk of leakage. 

At the same time, bentonite has a large specific surface area and adsorption performance, can absorb and fix the harmful 

substances in the mud, form a layer of dense filter cake, and effectively control the filtration loss and filtration speed of the mud.

4. Moisture control: In some Wells that require strict moisture control, bentonite can absorb some moisture, control the moisture

 content of the mud, and avoid damage to the formation.