Sodium carboxymethyl cellulose CMC, the modified cellulose, was first used in oil drilling, and then gradually applied to the food industry and other industries. Therefore, the application of sodium carboxymethyl cellulose in oil drilling is the most mature of.
Carboxymethyl cellulose sodium CMC is mainly used in oil drilling fluid and completion fluid in oil drilling.
In drilling fluid, it is mainly used as viscosifier, rheology control agent and fluid loss reducer. It has strong suspending ability, efficient ability to carry cuttings, clean cuttings, stabilize well wall, prevent mud loss, protect drill bit, and thin mud Cake thickness and other functions;
In the completion fluid, it mainly controls fluid viscosity, suspends heavy objects, carries fillers, and prevents fluid loss. It can be used in fracturing fluid instead of guar gum.
The mud containing sodium carboxymethyl cellulose CMC can make the well wall form a thin and hard filter cake with low permeability and reduce the water loss.
After adding sodium carboxymethyl cellulose CMC to the mud, the drilling rig can get a low initial shear force, so that the mud is easy to release the gas wrapped in it, and at the same time, the debris is quickly discarded in the mud pit. Drilling mud, like other suspension dispersions, has a certain shelf life. Adding CMC can make it stable and prolong the shelf life.
The mud containing sodium carboxymethyl cellulose CMC is rarely affected by mold, does not need to maintain a high pH value, and does not need to use preservatives.
The mud containing sodium carboxymethyl cellulose CMC has good stability and can reduce water loss even if the temperature is above 150 degrees.
Sodium carboxymethyl cellulose CMC for petroleum drilling has: less dosage, high pulping rate; good salt resistance, strong antibacterial property, convenient use; good filtration loss reduction and viscosity increasing effect; rheological control and strong suspension ability; The product is green and environmentally friendly, non-toxic, harmless and odorless; the product has good fluidity and convenient construction.