Calfee, Halter & Griswold LLP
Nano-hybrid lubricant and method thereof, and oil-based drilling fluid
The present invention relates to the well drilling field in petroleum industry, in particular to a nano-hybrid lubricant and method thereof, and oil-based drilling fluid. The lubricant comprises: graphite oxide and a biquaternary ammonium salt compound of which the cation part is represented by formula (1). The present invention also provides a method for preparation of the lubricant and an oil-based drilling fluid containing the lubricant. The lubricant provided in the present invention can be comprehended as a nano-hybrid material. Thus, oil-based drilling fluids that contain the lubricant provided in the present invention have lower lubrication coefficient and excellent lubricating property without or with little negative impact on rheological property of the oil fluid, and the lubricant provided in the present invention has excellent thermostability thus suitable for use in operation at a high temperature.
China University of Petroleum (Beijing)
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Yinbo Liexiang Shuanglei Lili Fan Deli Xinliang Guancheng Haifang Zhengqiang
He Han Peng Yang Liu Gao Li Jiang Sun Deng