Ploy anionic cellulose a kind of high polymer with high substitution ability and even dispereal, is more superorer synthetical featuers to CMC.(such as tackifier, water duty maintaining, acid resistance, corrosion resistance and etc). It can be widely used in drilling of petrolenm, election of minerals.

THE LIQUIO OF ORLING MUD PAC-1 QUALTY INDEX
ITEM	QUALITY INDEX
造浆率m3/t	Distilled water	≥350
	Sea water	≥250
	Saturated brine	≥300
降失水ml	Sea water(0.4%)	≤8.5
	Saturated brine(0.5%)	≤10.0
Against saltness	0.75%solution viscosity, Sea water divided distilled water	≥0.8

PAC MAIN SAMPLE AND PHYSICAL CHEMISTRY QUALTY INDEX
TYPE	Purity % ≥	Degree of substitution ≥	Viscosity mpa.s 25C.2%	NaCl %≤	PH	Water %≤
PAC-R	95	0.88-0.95	≥1500	3	6-8	10
PAC-LV	90	0.88-0.95	20-40	5	6-8	10
PAC-HV	85	0.80-0.85	1500	8	6-8	10

 CMC(and PAC)for drilling dluid has properties as follows：
  *It can red reduces water lose PAC is a special high effective filtrate lose reducer.
  *A good and tough mud cake can be formed.
  *Is has good properties of salt resistance and tempreature resistance,PAC is especially better then CMC.
  *The solution is a good non-Newtonian rheological behavor of the drilling mud slurry with CMC can be well contrilled.