sodium caboxy methyl cellulose(cmc) for petroleum

sodium caboxy methyl cellulose(cmc) for petroleum

1.CMC is used in drilling fluid as filtrate-loss reducer, it can form low permeability,flexibility,dense filter cake on the borehole wall. as far as possible to reduce the filtration loss. Used as suspending agent, plugging agent and thickener in low solid drilling fluid.
2.PAC is a kind of high molecular weight poly anionic cellulose, easily dispersed in all water-based drilling fluid, and it can be used from freshwater to saturated brine drilling fluid. At low solid polymer driling fluid, it can significantly reduce the filtration loss and thinning of mud cake, and has a strong inhibition to shale hydration. And  it has good temperature tolerance and salt resistance.