Calfee, Halter & Griswold LLP
Drilling fluid additive composition, and oil-based drilling fluid and use thereof
The present invention relates to the well drilling field in petroleum industry, in particular to a drilling fluid additive composition that contains a lubricant, an emulsifier, and a rheological modifier, wherein, the lubricant contains: graphite oxide and a biquaternary ammonium salt compound in which the cation part is represented by formula (1); the emulsifier is one or more of compounds represented by formula (I); the rheological modifier is a dimer acid-organic amine copolymer comprising structural units from dimer acid, structural units from alkylamine and structural units from arylamine. The present invention further provides an oil-based drilling fluid containing the composition and a use thereof. The oil-based drilling fluid containing the composition provided in the present invention obtains a lower lubrication coefficient, and favorable rheological property and thermostability, and is suitable for use in operation at a high temperature
China University of Petroleum (Beijing)
C C C C C C C
C10M C09K C09K C07C C10M C09K C10M
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Shuanglei Zhengqiang Yinbo Deli Guangchang Li Fan Xinliang Guancheng Liexiang Lili Haifang
Peng Deng He Gao Ma Zhao Liu Li Jiang Han Yang Sun