Drilling fluid additive composition, and oil-based drilling fluid and use thereof
申请人:CHINA UNIVERSITY OF PETROLEUM (BEIJING)
公开号:US10000684B2
公开(公告)日:2018-06-19
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
本发明涉及石油工业中的钻井领域,尤其涉及一种包含润滑剂、乳化剂和流变修饰剂的钻井液添加剂组合物,其中,润滑剂包含:氧化石墨和一种双季铵盐化合物,其中阳离子部分由式(1)表示;乳化剂是一种或多种由式(I)表示的化合物;流变修饰剂是一种二聚酸-有机胺共聚物,包括来自二聚酸的结构单元、来自烷基胺的结构单元和来自芳基胺的结构单元。本发明进一步提供了一种含有该组合物的油基钻井液及其用途。含有本发明提供的组合物的油基钻井液可获得较低的润滑系数、良好的流变性能和热稳定性,适合在高温条件下使用。