Super-amphiphobic, strong self-cleaning and high-efficiency water-based drilling fluids

JIANG Guancheng,NI Xiaoxiao,LI Wuquan,QUAN Xiaohu,LUO Xuwu

Table 1 Effects of different reservoir protection agents on capillary force.

Agent Contact angle after treated/ (°) Capillary force after treated/kPa Liquid level after treated/ mm No agent added 18.11 799.13 46 Non-filtration protectant 27.19 789.62 35 Film-forming protectant 39.64 768.43 32 S-A 165.72 -833.98 -31