Calfee, Halter & Griswold LLP
Drilling fluid additive composition and super high temperature super high density clay-free oil-in-water drilling fluid
The present invention relates to the field of petrochemical drilling and discloses a drilling fluid additive composition. The composition contains an emulsifier and a rheological modifier. The emulsifier is one or more of the compounds represented by Formula (1); the rheological modifier is dimer acid-organic amine copolymer, comprising structural units from the dimer acid, structural units from the alkylamine and structural units from the arylamine. The present invention further provides a drilling fluid containing the foregoing composition. When a clay-free oil-in-water drilling fluid contains the drilling fluid additive composition of the present invention containing the emulsifier and rheological modifier, it may have high temperature resistance and high density;
China University of Petroleum (Beijing)
C C C
C09K C07C C09K
inventional inventional inventional
Zepu Chunlei Yang Yinbo Shuanglei Fan Chong Zhengqiang Kai Lili Xinliang Yawei Xianbin Guancheng
Cheng Wang Xuan He Peng Liu Liu Deng Wang Yang Li Shi Huang Jiang