Calfee, Halter & Griswold LLP
Super-amphiphobic composite material and use of the same as inhibitor, lubricant, reservoir protectant, and accelerator in water-based drilling fluids
A super-amphiphobic composite material and use of the same as an inhibitor, lubricant, reservoir protectant, and accelerator in water-based drilling fluids. A method for preparing the amphiphobic composite material includes: performing a first mixing of nano-titanium dioxide and nano-silicon dioxide in an alcohol-water mixed solvent under an alkaline condition, to obtain a dispersion of nano-titanium dioxide and nano-silicon dioxide; then introducing a fluorosilicone-containing coupler into the dispersion of nano-titanium dioxide and nano-silicon dioxide and performing a second mixing. The amphiphobic composite material may be applied in water-based drilling fluids. It has an effect of strongly inhibiting hydrated swelling and disintegration, low toxicity and high compatibility; can solve problems such as well wall instability, blockage of drilling tools, and reservoir damage, etc.; and has long-term practical value in complicated wells such as extra-deep wells, horizontal wells and extended reach wells, and in mud-bearing shale formations.
China University of Petroleum (Beijing)
C C C C C C C
C09K C09K C09K C09K C09K C07F C09K
inventional inventional additional additional inventional inventional additional
Xi Jinsheng Xinliang Zhengqiang Yinbo Lili Guancheng Yang Xiaolin Chunyao Guangchang Kai Deli Xiaoxiao
Wang Sun Li Deng He Yang Jiang Bai Pu Peng Ma Wang Gao Ni