High-Temperature Resistant Colloid Gas Aphron Drilling Fluid Prepared by Using A Graft Copolymer Xanthan Gum-g-AA/AM/AMPS

Images of micro-bubbles in CGA drilling fluid before and after 180℃ aging. The low shear rate of CGA fluid prepared with XG and XG-AA/AM/AMPS. The particle size distribution and X-ray diffraction analysis of bentonite mud.