





In addition, six college students including Wang Wei, Sun Ruizhao and Zuo Donghua who participated in this training class made a wonderful sharing of insights for this five-day training.

CMC for Oil Drilling is also named PAC,poly anionic cellulose ether. PAC-HV, because of its high molecular weight, exhibits excellent non-Newton fluid property and can modify rheological property of slurries; PAV-LV, because of its low molecular weight, allows better water retention and is more resistant to salt and high temperature.
CMC can increase the viscosity of solution, it is is considered potentially harmless biologically to the human. therefore it can be used in the thickening, dispersion, emulsification, suspension and colloid protection of food, medicine, daily chemicals petroleum,papermaking, , textile and construction field.
For the drilling , well-digging of petroleum and natural gas
â‘ . The CMC slurry can form a filter cake on the wall of well to lower the water loss of well.
â‘¡ CMC can help slurry release the gas and dischaarge the broken matter
â‘¢ CMC can prolong the existing period of drilling fluid
â‘£ CMC drilling fluid is seldom infected by mould , the high PH value and antiseptic are unnecessary
⑤ CMC can be used as flush fluid to reduce the pollutation of soluble-salts
⑥ CMC slurry can work well in 150℃
PAC HV/LV
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