Carboxymethyl cellulose (CMC) is a non-toxic and tasteless white flocculent powder with stable performance and easy to dissolve in water. Its aqueous solution is neutral or alkaline transparent viscous liquid, soluble in other water-soluble adhesives and resins, and insoluble in organic solvents such as ethanol. CMC can be used as binder, thickener, suspension agent, emulsifier, dispersant, stabilizer, sizing agent, etc.
Sodium carboxymethyl cellulose (CMC) is the most widely used and convenient product in the production of cellulose ether, commonly known as "industrial MSG".
1, for oil,drilling, digging and other projects
The slurry containing CMC can form a thin and firm filter cake with low permeability on the well wall and reduce the water loss.
After CMC is added to the mud, the rig can get a low initial cutting force, so that the mud is easy to release the gas wrapped in it, and the debris is quickly abandoned in the mud pit.
(3) Drilling mud, like other suspended dispersions, has a certain existence period, and the addition of CMC can make it stable and extend the existence period.
Slurry containing CMC is rarely affected by mold, so it is not necessary to maintain a high pH and use preservatives.
Containing CMC as drilling mud washing fluid treatment agent, can resist various soluble salt pollution.
The slurry containing CMC has good stability and can reduce water loss even if the temperature is above 150 ° C.
High viscosity and high substitution CMC is suitable for low density mud, low viscosity and high substitution CMC is suitable for high density mud. The selection of CMC should be determined according to different conditions such as mud type, region and well depth.
2, for textile, printing and dyeing industry, the textile industry will CMC as sizing agent, used for cotton, silk wool, chemical fibers, blends and other strong yarn sizing;
Product performance and characteristics:
CMC has a high ability to control water loss. In particular, PAC is a highly effective fluid loss reducer at lower dosages. You can control the loss of water to a higher level. It does not affect other properties of the mud.
The formed mud cake is of good quality, strong and tough.
It has good temperature resistance and excellent salt resistance. Under a certain salt concentration, it still has a good ability to reduce water loss and maintain a certain rheology. Compared to soluble in salt water and soluble in water, the viscosity hardly changes. Particularly suitable for offshore drilling and deep well requirements.
It can well control the rheological properties of the mud. It has good non-Newtonian fluidity.
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