Drilling fluid additive composition and super high temperature super high density clay-free oil-in-water drilling fluid

US9528042B1 · kind B1 · utility

Assignee

• China University of Petroleum—Beijing · CN

Inventors

• Guancheng Jiang · Beijing, CN
• Zhengqiang Deng · Beijing, CN
• Yinbo He · Beijing, CN
• Xianbin Huang · Qingdao, CN
• Fan Liu · Taipei, TW
• Yang Xuan · Beijing, CN
• Zepu Cheng · Beijing, CN
• Lili Yang · Pasadena, US
• Chunlei Wang · Beijing, CN
• Shuanglei Peng · Beijing, CN
• Chong Liu · Longbeilingcun, CN
• Kai Wang · Beijing, CN
• Xinliang David Li · Mountain View, US
• Yawei Shi · Beijing, CN

Key dates

• Filing date: Apr 22, 2016
• Grant date: Dec 27, 2016
• Expiry date: Apr 22, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/035
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

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;