Sodium carboxymethyl cellulose (CMC HV, CMC LV) has the following main functions in drilling fluids:
Thickening effect: Increases the viscosity of drilling fluid to help suspend and carry cuttings.
Fluid loss reduction: Reduce the fluid loss of drilling fluid through the formation and maintain the stability of the well wall.
Stabilize the well wall: Form a thin and tough mud cake to reduce the risk of formation collapse.
Improve rheology: make drilling fluid have good fluidity and pumping performance.
