STUDY AND APPLICATION OF POTASSIUM CALCIUM BASE ASPHALT RESIN AMPHOTERIC ION POLYMER HIGH DENSITY DRILLING FLUID

Through tests,this drilling fluid is compounded of amphoteric ion XY27 as the center polymer,dispersant,plugging agent,sticking prevention agent,weighting agent,etc,and used in vertical and directional well of 4500-5500 meters.In the application,it shows the good fluidity,innibity,anti-sticking effect,stability in high temperature and good shear thinning behavior,filter wall building property,collapse-proof,anti-contamination of salt.The drilling fluid density is high up to 1.96g/cm3,penetration rate is increased by 18%.